Featured Research

from universities, journals, and other organizations

Vaccines And Autism: Many Hypotheses, But No Correlation Found

Date:
February 1, 2009
Source:
Infectious Diseases Society of America
Summary:
An extensive new review summarizes the many studies refuting the claim of a link between vaccines and autism. The review looks at the three main hypotheses and shows how epidemiological and biological studies refute these claims.

An extensive new review summarizes the many studies refuting the claim of a link between vaccines and autism. The review, in the February 15, 2009 issue of Clinical Infectious Diseases and now available online, looks at the three main hypotheses and shows how epidemiological and biological studies refute these claims.

“When one hypothesis of how vaccines cause autism is refuted, another invariably springs up to take its place,” said study author Paul Offit, MD, of the Children’s Hospital of Philadelphia. Fears about vaccines are pushing down immunization rates and having a real impact on public health, he added. Vaccine refusal is contributing to the current increase in Haemophilus influenzae cases in Minnesota—including the death of one child—and was a factor in last year’s measles outbreak in California.

The controversy began with a 1998 study in The Lancet that suggested a link between the combination measles-mumps-rubella (MMR) vaccine and autism. Dr. Offit and co-author Jeffrey Gerber, MD, PhD, also of the Children’s Hospital of Philadelphia, reviewed more than a dozen large studies, conducted in five different countries, that used different methods to address the issue, and concluded that no data supported the association between the MMR vaccine and autism. The correlation between MMR vaccine and the appearance of autism symptoms is merely coincidental, the authors say, because the MMR vaccine is given at the age when autism symptoms usually appear.

Also hypothesized as a cause has been the ethylmercury-containing preservative thimerosal, which was used in vaccines for over 50 years. However, the authors review seven studies from five countries that show that the presence or absence of thimerosal in vaccines did not affect autism rates.

The third suggestion has been that the simultaneous administration of multiple vaccines overwhelms or weakens the immune system. The authors explain that children’s immune systems routinely handle much more than the relatively small amount of material contained in vaccines. Furthermore, today’s vaccines contain many fewer immune-triggering components than those from decades past. Regardless, autism is not triggered by an immune response, the authors say.

With outbreaks of vaccine-preventable diseases on the rise due to some worried parents choosing not to vaccinate their children, Dr. Offit said, “Parents should realize that a choice not to get a vaccine is not a risk-free choice. It's just a choice to take a different, and far more serious, risk.”


Story Source:

The above story is based on materials provided by Infectious Diseases Society of America. Note: Materials may be edited for content and length.


Cite This Page:

Infectious Diseases Society of America. "Vaccines And Autism: Many Hypotheses, But No Correlation Found." ScienceDaily. ScienceDaily, 1 February 2009. <www.sciencedaily.com/releases/2009/01/090130093407.htm>.
Infectious Diseases Society of America. (2009, February 1). Vaccines And Autism: Many Hypotheses, But No Correlation Found. ScienceDaily. Retrieved September 19, 2014 from www.sciencedaily.com/releases/2009/01/090130093407.htm
Infectious Diseases Society of America. "Vaccines And Autism: Many Hypotheses, But No Correlation Found." ScienceDaily. www.sciencedaily.com/releases/2009/01/090130093407.htm (accessed September 19, 2014).

Share This



More Health & Medicine News

Friday, September 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com
How The 'Angelina Jolie Effect' Increased Cancer Screenings

How The 'Angelina Jolie Effect' Increased Cancer Screenings

Newsy (Sep. 19, 2014) Angelina's Jolie's decision to undergo a preventative mastectomy in 2013 inspired many women to seek early screenings for the disease. Video provided by Newsy
Powered by NewsLook.com
The Cost of Ebola

The Cost of Ebola

Reuters - Business Video Online (Sep. 18, 2014) As Sierra Leone prepares for a three-day "lockdown" in its latest bid to stem the spread of Ebola, Ciara Lee looks at the financial implications of fighting the largest ever outbreak of the disease. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins