Welcome To Vaccine Awareness Network
Updated 10 May 2013
 
 
Vaccines And How They Are Made
The chemicals that go into vaccination - newly updated 13 June 2012
 
 
Your Immune System, How It Works And How Vaccines Damage It
Vaccines and Immune Dysfunction - updated 28 February 2013
 
 
The Herd Immunity Theory - Treating Our Children Like Cattle
The Herd Immunity Theory - updated 28 February 2013
 
 
Did Vaccines Really Halt Killer Diseases?
Did Vaccines Really Stop Diseases? A look at history - updated 10 April 2010 with modern day victim of smallpox vaccine
 
 
Vaccination And Abortion
The Use Of Foetal Tissue in Vaccines - newly updated 15 March 2012
 
 
RU-486 Abortion Killing Pill
Abortion Pill That Kills the Mother Too - NEW page!
 
 
Vaccines: A Religious Contention
Vaccines: A Religious Contention - updated 17 December 2009
 
 
Mandating Vaccines Or Not?
Mandating Vaccines or Not? My speech to Nuffield Bio Ethics on the pitfalls of mandating vaccination - includes link to vaccinationchoice.org - updated 8 February 2009
 
 
Pediacel 5-in-1 Super Jab
5 in 1 vaccine - updated 26 August 2012.
 
 
Manufacturer's Information About Pediacel 5-in-1 Vaccine
 
 
Autism and Cerebral Palsy From DPT Vaccine
Maryamber's Story - and other Cerebral Palsy after Vaccination Cases, updated 13 April 2010
 
 
Gardasil and Cervarix - The Cervical Cancer Vaccines
Gardasil and Cervarix - The Cervical Cancer Vaccine - now updated 31 March 2010 - Spain Withdraws Batch Of HPV Vaccine
 
 
Gardasil Vaccines Continued
Gardasil Vaccine Continued And Cases Of Gardasil/Cervarix Damage And Death, updated 10 May 2013
 
 
Prevnar Vaccination
Prevnar and Pneumonia Vaccinations, including info on PCV 13, updated 3 February 2012
 
 
Travel Vaccines
Travel Vaccines - updated 14 June 2012
 
 
Tetanus Vaccine
Tetanus Vaccine - updated 6 May 2012
 
 
MMR, Single Vaccines And MMRV Vaccine
MMR and Single Measles, Mumps and Rubella vaccines and MMRV information - updated 10 May 2013 - NEW COURT RULING SHOWING MMR CAUSED ASD! Contains Graphic Damage Photo.
 
 
Killer Measles Vaccine Is Withdrawn And Other Vaccine Death Cases
Four Babies Killed In Measles Vaccine Campaign - updated 26 August 2012 with more deaths, PAGE FULL.
 
 
Infant Vaccines Produce Autism Symptoms In Primates
Shots Cause Autism In Monkeys
 
 
If You Don't Want The MMR We'll Force You and Other Vaccination Force Stories
Bully Boy Tactics Proposed - includes case of forced vaccination with various vaccines, updated 10 May 2013
 
 
Meningitis C Vaccine
Various articles and citations - updated 30 August 2012
 
 
Hepatitis B Vaccine...aluminium....thimerosal (mercury)....yeast...but don't worry, it's gluten free!
Hep B Manufacturer's Information - updated with details of court admitted MS and Death Caused By Hep B Vaccine, updated 18 November 2012
 
 
Hepatitis B Vaccine Kills Baby and other Vaccine Death Cases
Updated 10 May 2013
 
 
Vaccine Companies Investigated For Manslaughter and other Vaccine Court Cases
And Other Vaccine Companies/Doctors On Trial For Vaccine Deaths, Injuries and Fraud - Updated 21 February 2013, now including Investigations into Swine Flu Scam
 
 
Iatrogenic Child Abuse
Iatrogenic child abuse: vaccinations and other medical abuse of children by doctors
 
 
Bullying, Rude and Discriminatory Doctors who Forget Vaccines are a CHOICE
Updated 10 May 2013
 
 
My Fight For Health After Vaccination
A Vaccine Damage Case - updated 6 March 2012 to include my friend's and relatives vaccine damage cases
 
 
Vaccine Injury Photos From The CDC
WARNING! Very Graphic Vaccine Damage Pictures. Don't Look If Easily Upset - updated 21 August 2011
 
 
Vaccine Debate Page
A Place Where You Can Send Your Views On Vaccines And Health - updated 21 August 2011
 
 
Vaccination And Your Legal Rights
Your Legal Right To Own Your Own Body - updated 16 August 2009 with new information
 
 
Vaccination DESTROYS Natural Immunity!
Transplacental and Breast Milk Immunity and How they are Diminished by Vaccination - new page 10 May 2013
 
 
Disease Killing Properties Of Breast Milk
Immunising Your Baby With Breast Milk - updated 18 June 2012
 
 
Polio: The Disease, the Vaccine and the Controversies
NEW Page - updated 26 August 2012
 
 
Baby Gallery
Unvaccinated Bundles of Joy! - updated 8 May 2013
 
 
The Home Birth Pages - My Story
The Hospital Birth Experience
 
 
The Home Birth Pages
My Unassisted Childbirth - Reclaiming My Femininity - updated 17 May 2012
 
 
The Home Birth Pages - British Maternity Care (The Bullying I got When Pregnant with Yanny)
My Struggle To Have A Natural Pregnancy With The NHS - updated 5 May 2012
 
 
The Home Birth Pages - Yanny's Unhindered Home Birth
My Baby's Unhindered Home Birth - updated 6 May 2012
 
 
Home Birth And Your Legal Rights. How To Have A Natural Birth
Your Right To Birth Without Violence And Other Home Birth Issues - updated 17 May 2012
 
 
THE DANGERS OF EPISIOTOMY
And Tips For Easing Pain. Updated 6 May 2012
 
 
Obstetric Myths and Realities
Caesareans and Breech Births - updated 17 May 2010
 
 
Vaccine Information For Pregnant Women
What You Should Know If Considering A Vaccination During Pregnancy - updated 7 October 2012 - ALERT: MISCARRIAGES AND STILLBIRTHS AFTER H1N1 VACCINE!!
 
 
Home Education Photo Diary
Photo Diary of Child Friendly Home Schooling - updated 7 August 2009 - PAGE FULL, WILL ADD NEW ONE LATER.
 
 
Home Education Photo Diary
Page two of my children's home schooling - updated 10 February 2013
 
 
Home Education And Your Legal Rights
Updated 3 March 2012.
 
 
Other People's Breast Milk
VAN UK'S Founder On 'Other People's Breast Milk' and Comments Regarding The Show
 
 
Dangers Of Formula Milk
Formula Milk Is NOT As Good As Breast Milk And Is Not A Breast Milk Substitute! Updated 14 June 2012
 
 
Vitamin K: Does Your Baby Really Need It?
Updated 6 May 2012
 
 
Mercury Free Vaccines Still Have Mercury In Them
What's Not On The Label
 
 
Pro-Vaccine Arguments
VS. Medical Evidence - updated 28 February 2013
 
 
Pro-Vaccine Arguments Page 2
VS. Medical Evidence - NEW page completed on 25th August 2012
 
 
Vaccine Shedding
The spreading of viruses and bacteria via vaccination. Includes Information on the symptoms and treatment of measles. Updated 17 July 2012
 
 
Why I Don't Vaccinate My Children
And The Birth of VAN UK - updated 26 August 2012
 
 
Six Reasons Why I Don't Vaccinate My Children
Some of the reasons I don't vaccinate, from my blog, 7th October 2012
 
 
Vaccines And Sudden Infant Death Syndrome
The Link Between Vaccines And SIDS - updated 22 July 2012
 
 
Midwives And Health Professionals Against Vaccination
Updated 30 August 2012
 
 
Media Censorship of Vaccine News
Updated 2 June 2012.
 
 
Vaccine Victim's Dad Refuses To Bury Him After 21 Years
Couragious Dad Refuses To Allow A Definition Of SIDS On His Son's Death Certificate
 
 
BCG Vaccine
BCG vaccine information - new page 4 August 2012
 
 
Homeopathic Vaccination
Updated 7 October 2012
 
 
Doctor Says Vaccines Cause Micro Vascular Strokes In Babies and Children
A conventional doctor links vaccines with strokes, SIDS, Autism and other illnesses - updated 19 October 2010
 
 
Boy Partially Losses Hearing After Vaccination
Updated 22nd August 2012 with more deafness and blindness after MMR cases
 
 
Delaying Vaccination Cuts Asthma Risk (and Other Allergies Related to Vaccines).
Citation in the Journal of Allergy And Clinical Immunology and Info on Vaccines and Auto-Immunity - 2 August 2012
 
 
Vaccines, Mercury, Aluminium and Autism Studies
With link to http://www.mercurymadness.org. Manufacturer's Say Vaccines Cause Autism! - updated 28 February 2013
 
 
Contraindications (people who shouldn't be vaccinated) and side-effects From The Merck Manual (vaccine manufacturer)
Medical Information On Who Should Not Have Vaccines - Merck and GP Notebook - updated 6 September 2009
 
 
Flu Vaccines
Updated 28 February 2013
 
 
Swine Flu Epidemic/ H1N1 Vaccine Deaths and Injuries
Created By Lab Blunder - now recording deaths and injuries from jab - page now full.
 
 
Swine Flu Vaccine
Ingredients and other information - updated 10 October 2011
 
 
Tamiflu
What You Should Know About Tamiflu - updated 22 January 2010
 
 
More Educated Mothers Are Less Likely To Vaccinate
A New Study Shows That University Educated Mums Are More Likely To Refuse Vaccines And Other Studies Showing Educated Mothers Refusing Vaccines - updated 21 February 2013
 
 
Diseases In The Vaccinated
Medical Studies And Reports Showing Vaccines Do Not Immunise - Updated 25 April 2009
 
 
Diseases In The Vaccinated Page 2
Page Full.
 
 
Diseases in the Vaccinated - Page 3
Vaccine 'Preventable' Diseases Occuring in the Vaccinated - NEW PAGE. 11 May 2013
 
 
Seven School Kids Taken To Hospital After Vaccines and Other Vaccine Disasters
Kids sicken after DT/IPV Vaccines - and other reactions after vaccination drives, updated 21 February 2013
 
 
Acute disseminated encephalomyelitis after vaccination caused girl to have one and a half hour seizure
And other encephalitis after vaccination, updated 17 October 2009
 
 
Infant Mortality Rates Fall Where 'Immunisation' Rates Are Low
Infant Mortality Rates Fall In Line With Lowering Vaccination Rates - updated 31 January 2013
 
 
Chickenpox: Is It Really A Killer Disease?
Suddenly this benign childhood illness has turned into a 'deadly killer' because they are introducing a vaccine - updated 31 January 2013
 
 
Selective Vaccination
If You Decide To Vaccinate - updated 30 January 2013
 
 
Vaccine Damage Payments Unit
How To Make A Claim For Compensation If Your Loved One Is Vaccine Injured - updated 23 March 2009
 
 
Healing From Vaccine Damage
A Case Study Using Homeopathy to Detox from Vaccines - page created 6 May 2009.
 
 
Legal Help For Vaccine Damage And Pro-Choice Issues
Solicitor/Lawyer Information - updated 2 June 2012
 
 
Treating Childhood Illnesses
These days, doctors and parents have lost the art of actually nursing their child through a normal childhood illness. Here we tell you the symptoms and treatment of measles, mumps, rubella, chickenpox, rotavirus and whooping cough - updated 15 June 2012
 
 
Childhood Diseases Can Be Good For Your Child!
Studies showing childhood diseases reduce autoimmunity - updated 21 November 2010
 
 
Stupid Medical Advice Which Has Been Consigned To History Books
Updated 12 April 2012
 
 
Double Standards - it's not okay to ingest this but fine if we inject it
Authorities Admitting Concern Over Chemicals Used In Other Products That Are Also Used In Vaccines - updated 30 January 2013
 
 
Ian's Life
A page dedicated to a little boy who died of an adverse reaction to Hepatitis B vaccine. WARNING: graphic vaccine damage picture
 
 
Animal Vaccines
The Dangers of Animal Vaccines and naturally rearing animals - updated 27 September 2012
 
 
Remember My Name
Honouring Those Who Have Died From Vaccination - updated 15 April 2012
 
 
Remember My Name - Page 2
Honouring Those Who Have Died From Vaccination - Page 2, updated 28 February 2013
 
 
Vaccines, BSE and vCJD
In Memory of Andy Black - WARNING, GRAPHIC PHOTOS, DON'T LOOK IF EASILY UPSET - updated 2 August 2012
 
 
Vaccination: An Ecological Disaster
Environmental Reasons Why Vaccines Aren't so Great. 2% of World HIV Cases Caused By Vaccines. NEW PAGE.
 
 
Skewed Statistics
How Studies are 'Doctored' to Make Vaccines Seem More Effective - NEW page! updated 8 August 2012
 
 
Youth Page
Under 18's Page - Know Your Vaccination Rights - Updated 25 June 2012
 
 
Take Vaccines Out of Schools Campaign!
Example letters you can use to complain about the use of vaccination in schools - updated 23 June 2012
 
 
Vaccines Didn't Save Us From Smallpox
Historical Evidence Against Vaccination and Historical Vaccine Death Cases
 
 
Jo's Home Education Resource Page
Home Educated Kids are Rarely at Home! - updated 3 June 2012
 
 
A Parent's Guide for Pro-Vaccine Pediatricians
NEW PAGE - Countering Pro-Vaccine Arguments, 30th April 2012
 
 
Rotavirus Vaccine
Rotavirus Vaccine Planned for UK Babies Next Year
 
 
Paracetamol (Acetaminophen), Ibuprofen and Vaccines
New Page
 
 
Vaccine Books
VAN UK Shop - updated 12 September 2009
 
 
Donate To VAN UK to Keep This Website Running!
Donate To VAN UK to Keep This Website Running!
 
 
Letters To VAN UK
About vaccination and it's affects - updated 25 June 2012
 
 
Guest Book
Comments are Moderated (Polite Messages Only)- Moderated 10 May 2013).
 
 
Contact Us
Contact Us - updated 30 January 2013
 
 

Vaccine Shedding


THE DILEMMA OF VACCINE-INDUCED DISEASE AND UNVACCINATED CHILDREN

It has long been known that vaccines can cause the diseases they were meant to immunise against.
For instance, the live oral polio vaccination can cause polio – a disease named vaccine-associated paralytic polio (VAPP), which is mentioned on the UK dept of health website, immunisation.org.uk
‘If a baby has had the oral polio vaccine, the live virus can be found in the baby's poo for up to six weeks afterwards.’
It was actually for this reason that the OPV was voted out and injectable polio vaccine re-introduced. The oral vaccine was responsible for the ONLY cases of polio in the developing world. (Committee on Immunization Practices meeting, held 20th June 1996).

According to DRAFT ACIP meeting minutes, February 2001, page 28:

‘OPV not only causes vaccine-associated paralytic polio, but if it’s use is stopped, the OPV strain can still re-emerge….to date, no developing country has used IPV only, so there is little information on it’s immunogenicity (i.e. there’s no evidence the injectable version prevents polio either)…Dr. Halsey asked if viral mutations from vaccination occur over a long period in the excretions of an immunosuppressed individual…Dr. Abramson recalled data showing that the virus can be found in people 10 years after vaccination…the fact that children are being paralysed by vaccine derived viruses, proves their virulence. Dr. Kew’s 1997 report said that vaccine derived viruses could be replicating in immunosuppressed individuals…however, vaccination cessation is not expected anytime soon.’

The MMR vaccine also contains live viruses and according to an MMR 2 manufacturer’s data sheet from Merck, Sharpe and Dohme, ‘It is not known whether measles or mumps vaccine virus is secreted in human milk. Recent studies have shown that lactating postpartum women immunised with live attenuated rubella vaccine may secrete the virus in breast milk and transmit it to breast-fed infants. In the infants with serological evidence of rubella infection, none exhibited severe disease; however, one exhibited mild clinical illness typical of acquired rubella. Caution should be exercised when M-M-R II is administered to a nursing woman.’

Pregnancy was listed as a contraindication to the vaccine and they advised not getting pregnant for 3 months after an MMR vaccine has been given. Since it has been proven that the viruses are secreted in body fluid, it is reasonable to assume that close contact with a vaccinated infant would also confer risk.

Indeed, my eldest daughter contracted measles at 15 months, after sitting next to a baby who’d just had his MMR jab that morning. She came out with the measles rash exactly 14 days after eating her lunch with him, and the incubation period for measles is a fortnight.

BCG vaccine is also live (and given to minority babies at birth) and can mutate. According to the Medical Monitor, June 1992, ‘BCG vaccine can cause disseminated TB in immunosuppressed individuals and children…local ulceration appears to be more common in babies.’

But it isn’t only live vaccines that can cause a problem. ‘Killed’ vaccines have been known to mutate and cause disease, even amongst close contacts of the recipient.
Meningitis vaccines such as HIB and Meningitis C can also spread. The medical profession are currently studying 15,000 teenagers to discover whether immunisation helps trigger the most deadly strain of meningococcus bacteria. Throat swaps are being taken from 7 centres around the country. A spokesman said
‘The study being conducted will address whether or not vaccine escape variants ..will begin to spread among the population..as a result of the immunisation programme.’ Escape variants can switch was B to C or C to B etc. (John Von Radowitz, Medical Correspondent, PA News).

How Can Parents Protect Their Unvaccinated Children?

Firstly, breast feed! Breast milk kills polio virus and meningitis and a whole host of other diseases. Carry on breast feeding your child for as long as possible (the World Health Organisation recommend a MINIMUM of 2 years).

Do not change the nappy/diaper of a friend’s vaccinated baby.

Do not allow your baby to put another baby’s soother in his mouth, or to bottle share.

Regularly give your baby vitamin C supplementation. Drops are available for very small babies, or chewable ones for toddlers. I gave my children 3,000mgs of vitamin C a day and they never had any serious illnesses or complications. Remember, you cannot overdose on vitamin C and any that the body does not need, is simply re-absorbed.

If you know a baby has just been vaccinated, or has a disease, consider giving a vitamin A supplement as children with adequate levels of this vitamin do not get serious side-effects from childhood disease. This is also good for the vaccinated child as good levels of vitamin A and C have been shown to reduce vaccine side-effects. If you choose this option, please discuss it with a health care provider to find the correct dose for your child, as too much vitamin A can be dangerous.

Alternatively, give your baby foods rich in vitamin A such as carrots, sweet potatoes, pumpkin, spinach, butternut squash, turnip greens, mustard greens, and lettuce. Vitamin A is also present in free-range eggs, if you aren’t vegan. If your baby is too young for solids, eat these foods yourself and the nutrients will be passed to him via your breast milk.

Consider a homeopathic nosode (homeopathic version of vaccination). These can be given by a qualified homeopath to fill a child’s susceptibility to the disease (e.g. pertussin 30 if the child is exposed to whooping cough).

Help – My Child Has Measles!

If your child picks up measles, it helps to be informed so you know what to look for and how to treat it.

The Symptoms:

Measles begins like a cold with runny nose, sore throat and cough. Sometimes the child might get sticky eyes (conjunctivitis). There will be white spots on the inside of the mouth called Koplik’s spots.
3 to 5 days later, a rash will appear, starting behind the ears and on the face. Within a day it will spread to the body. There will be a fever and sometimes vomiting.
Within another 3 to 5 days, the rash disappears and the fever goes away. On very rare occasions, the child’s rash may bleed, they may suffer a febrile convulsion or measles encephalitis and death. This is unlikely, though, as according to Medicine Net, ‘measles has a low mortality rate in well nourished healthy children.’

Measles encephalitis can also occur in vaccinated children as Atypical Measles Syndrome (AMS), as Medicine Net describe: ‘AMS begins suddenly with high fever, headache, cough, and abdominal pain. The rash may appear 1 to 2 days later, often beginning on the limbs. Swelling (edema) of the hands and feet may occur. Pneumonia is common and may persist for 3 months or more.’

They blame incorrect vaccine storage on the fact that only vaccinated patients get AMS, or on the old single measles jab, ‘Immunization with inactivated measles virus does not prevent measles virus infection. It can, however, sensitize a person so that the expression of the disease is altered, resulting in AMS.’

When my mother got my measles shot in 1978, she was told that was effective. Now they say it isn’t. It does not inspire confidence in vaccination when they keep changing their story.

How Can My Child Become Immune To Measles?

Again, according to Medicine Net, ‘A child born to a mother who had measles receives immunity from its mother lasting most of the first year of life. One attack of measles provides lifelong immunity’ – there are other studies which show that immunity from mother’s milk lasts even longer than that. It is a strong argument against vaccination, as most mothers of this generation will have had the vaccine and therefore their ability to pass on immunity to their children is weakened. This shows that vaccination is actually destroying natural immunity rather than building it.

Treatments:

When my daughter had measles I withheld all food from her. Food feeds a virus as well as the person, and valuable energy is wasted on the digestive system when it should be going to the immune system. Fasting allows the body to rest. We usually don’t feel like eating when we are ill because it is our body’s way of telling us to fast.

I made sure she had regular fluids to avoid dehydration – starting with water and then progressing to fruit juice when she was a little better. Breast milk is also ideal. For her fever, I gave regular doses of Belladonna 6 homeopathy and tepid sponge bathing to prevent any febrile convulsion (which are caused by allowing the temperature to rise too quickly).

I didn’t give any paracetamol or another anti-pyretic because if you try to suppress symptoms you end up pushing them into the body and causing measles complications. According to Medicine Net, ‘Avoid aspirin and all aspirin products. (Aspirin today is not recommended for children or for patients with infectious diseases caused by viruses, because of the association with Reyes syndrome)’. Nearly all measles complications are either in malnourished children or healthy children whose measles was ‘medicated.’
I used calamine lotion on her spots to ease any discomfort. Her rash disappeared after 3 days and she was fully recovered in 8 days and did not get ill (even with a cold) for another year or more afterwards.






Baby Got Yellow Fever From Mother's Vaccine

A baby fell badly ill after his mother ignored advice to avoid the yellow fever vaccine while breastfeeding.

Tests show the five-week old boy contracted a vaccine strain of the virus directly through receiving milk from his mother.

The case provides the first known proof that the jab should be avoided while mothers lactate, experts in Canada have said.

Dr Susan Kuhn, who co-authored the research for Alberta Health Services, said: "Until recently, avoidance of vaccination of breastfeeding women with yellow fever vaccine had been based on theoretical grounds only."

The mother, whose nationality was not revealed, received travel advice and a vaccination for yellow fever before visiting Venezuela when the baby was 10 days old.

The infant did not receive vaccinations for the trip and they travelled together with breastfeeding continuing.

"The previously healthy five-week-old infant male presented to the hospital with a two-day history of fever and irritability," the authors wrote in the Canadian Medical Association Journal. "The day before his admission, he had been noted to have focal seizures on alternating sides."

Testing of the spinal fluid revealed evidence of recent infection with the yellow fever virus.

The travellers stayed in urban Venezuela where yellow fever is not known to be a risk, and the baby showed no sign of insect bites, had not been in contact with sick people and was not exposed to animals showing symptoms, which prompted the authors to conclude that the likely explanation was transmission through breastfeeding.

"This probable case of yellow fever virus further supports the current recommendations for avoidance of yellow fever vaccination in lactating mothers of infants under nine months of age," the authors added. "While there may be situations in which the mother will have unavoidable and significant risk of yellow fever exposure, the risk to the infant due to maternal vaccination must be weighed against the risk of wild-type virus infection."

Source: The Press Association, 7th February 2011.

Transmission of mumps virus from mumps-vaccinated individuals to close contacts

During a recent mumps epidemic in the Netherlands caused by a genotype D mumps virus strain, we investigated the potential of vaccinated people to spread mumps disease to close contacts. We compared mumps viral titers of oral fluid specimens obtained by quantitative PCR from vaccinated (n = 60) and unvaccinated (n = 111) mumps patients. We also investigated the occurrence of mumps infection among the household contacts of vaccinated mumps patients. We found that viral titers are higher for unvaccinated patients than for vaccinated patients during the 1st 3 days after onset of disease. While no symptomatic cases were reported among the household contacts (n = 164) of vaccinated mumps patients (n = 36), there were cases with serological evidence of asymptomatic infection among vaccinated household contacts (9 of 66 vaccinated siblings). For two of these siblings, the vaccinated index patient was the most probable source of infection. We conclude that, in this particular outbreak, the risk of a close contact becoming infected by vaccinated patients was small, but present.

Source: Vaccine
Volume 29, Issue 51, 28 November 2011, Pages 9551-9556.

Sibling Transmission of Vaccine-Derived Rotavirus (RotaTeq) Associated With Rotavirus Gastroenteritis

Although rotavirus vaccines are known to be shed in stools, transmission of vaccine-derived virus to unvaccinated contacts resulting in symptomatic rotavirus gastroenteritis has not been reported to our knowledge. We document here the occurrence of vaccine-derived rotavirus (RotaTeq [Merck and Co, Whitehouse Station, NJ]) transmission from a vaccinated infant to an older, unvaccinated sibling, resulting in symptomatic rotavirus gastroenteritis that required emergency department care. Results of our investigation suggest that reassortment between vaccine component strains of genotypes P7[5]G1 and P1A[8]G6 occurred during replication either in the vaccinated infant or in the older sibling, raising the possibility that this reassortment may have increased the virulence of the vaccine-derived virus. Both children remain healthy 11 months after this event and are without underlying medical conditions.

Source: Pediatrics Vol. 125 No. 2 February 1, 2010
pp. e438 -e441

Recently vaccinated children may serve as reservoirs and potential transmitters of infection.

The effects of whole-cell pertussis vaccine wane after 5 to 10 years, and infection in a vaccinated person causes nonspecific symptoms[3-7]. Vaccinated adolescents and adults may serve as reservoirs for silent infection and become potential transmitters to unprotected infants[3-11]. The whole-cell vaccine for pertussis is protective only against clinical disease, not against infection[15-17]. Therefore, even young, recently vaccinated children may serve as reservoirs and potential transmitters of infection.

Source: Medscape Today, http://www.medscape.com/viewarticle/414768_3

Antigenic Drift from Vaccines

A new study by researchers from the Massachusetts Institute of Technology has revealed the mechanism behind the phenomenon known as antigenic drift.

Antigenic drift occurs when pressure from the body's immune system causes a virus used in a vaccine to mutate into a slightly different form that can potentially be more infectious.

The scientists, led by Ram Sasisekharan, a professor of health sciences and biological engineering at MIT, conducted the study by examining the chain of amino acids in the viral protein hemagglutinin. They identified which amino acids were most likely to mutate into forms that would improve the viruses' capability to infect new hosts.

The knowledge acquired by Sasisekharan and his team could help influenza vaccine designers develop vaccines that do not produce fitter viruses, as the evolved strains are known.

New strains of influenza emerge constantly, leaving researchers searching for which new strains should be included in the seasonal influenza vaccine, which must be reformulated every year.

The vaccines stimulate the production of antibodies that target a section of the hemagglutinin protein known as the antigenic site. When a virus encounters antibodies it can change slightly into a form that can spread more easily to those that have not been vaccinated and can bind more tightly to the surfaces of cells in the respiratory tract of flu victims, making it more infectious.

With funding from the U.S. National Institutes of Health and the Singapore MIT Alliance for Research and Technology, Sasisekharan and his team sought to find out how this phenomenon occurs.

They examined the hemagglutinin protein using an approach called network analysis, which looks at the relationship between the individual amino acids that make up the protein. The resulting model showed that those amino acids located in the protein's antigenic region that were highly linked to those in the receptor-binding region were more likely to change affinity upon mutation. Selection pressure due to vaccination could contribute to the evolution of fitter viruses by producing better-binding hemagglutinin proteins.

“The idea that hemagglutinin can only accommodate certain mutations without losing fitness is not a new one, but what this paper gives us is a way to understand how changes in distant amino acids affect receptor binding,” David Topham, a professor at the University of Rochester School of Medicine, said.

Sasisekharan said that with knowledge of which amino acids are most likely to mutate into a more infectious form, vaccine producers could create vaccines that do not provoke mutations.

“This understanding of the relationship between the antigenic site and the receptor-binding site could be added to the current methods of vaccine selection and vaccine designs to limit drift,” Sasisekharan said.

Source: Vaccine News Daily, 28th December 2011.

How Bacteria Behind Serious Childhood Disease Evolve to Evade Vaccines

Genetics has provided surprising insights into why vaccines used in both the UK and US to combat serious childhood infections can eventually fail. The study, recently published in Nature Genetics, which investigates how bacteria change their disguise to evade the vaccines, has implications for how future vaccines can be made more effective.

In spite of the success of the vaccine programmes, some pneumococcal strains managed to continue to cause disease by camouflaging themselves from the vaccine. In research funded by the Wellcome Trust, scientists at the University of Oxford and at the Centers for Disease Control and Prevention in Atlanta studied what happened after the introduction of this vaccine in the US. They used the latest genomic techniques combined with epidemiology to understand how different serotypes of the pneumococcus bacteria evolve to replace those targeted by the initial vaccine.

Source: Wellcome Trust (2012, January 29). How bacteria behind serious childhood disease evolve to evade vaccines. ScienceDaily. http://www.sciencedaily.com/releases/2012/01/120129151005.htm

Animal Vaccine Combines to Make New Deadly Virus - Has Implications for Human Vaccines.

Recombination between herpesviruses has been seen in vitro and in vivo under experimental conditions. This has raised safety concerns about using attenuated herpesvirus vaccines in human and veterinary medicine and adds to other known concerns associated with their use, including reversion to virulence and disease arising from recurrent reactivation of lifelong chronic infection. We used high-throughput sequencing to investigate relationships between emergent field strains and vaccine strains of infectious laryngotracheitis virus (ILTV, gallid herpesvirus 1). We show that independent recombination events between distinct attenuated vaccine strains resulted in virulent recombinant viruses that became the dominant strains responsible for widespread disease in Australian commercial poultry flocks. These findings highlight the risks of using multiple different attenuated herpesvirus vaccines, or vectors, in the same populations.

Source: Science
Vol. 337 no. 6091 p. 188  http://www.sciencemag.org/content/337/6091/188

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