About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Researchers Find Evidence That H1N1 Influenza Vaccine Is Safe To Use During Pregnancy

by Rukmani Krishna on September 26, 2013 at 12:04 AM
Font : A-A+

 Researchers Find Evidence That H1N1 Influenza Vaccine Is Safe To Use During Pregnancy

Evidence of the H1N1 influenza vaccine's safety during pregnancy was found by researchers from the University of California, San Diego School of Medicine and Boston University, in collaboration with the American Academy of Allergy Asthma and Immunology (AAAAI). The national study, which was launched shortly after the H1N1 influenza outbreak of 2009, is summarized in two companion papers published online on September 19 in the journal Vaccine.

"The overall results of the study were quite reassuring about the safety of the flu vaccine formulations that contained the pandemic H1N1 strain," said Christina Chambers, PhD, MPH, Director of the non-profit Organization of Teratology Information Specialists (OTIS) Research Center and lead investigator of UC San Diego's team. "We believe our study's results can help women and their doctors become better informed about the benefits and risks of flu vaccination during pregnancy."

Advertisement

Despite federal health authorities' recommendations that all pregnant women be vaccinated for influenza, it is estimated that less than 50 percent of women follow this advice, largely because they are concerned about the effects flu vaccines might have on the developing baby.

Since it was anticipated that the 2009 H1N1 influenza season would be severe, a national study was launched by the Vaccines and Medications in Pregnancy Surveillance System (VAMPSS), a collaboration between UC San Diego School of Medicine and Boston University and coordinated by AAAAI to gather data on the safety of this vaccine during pregnancy.
Advertisement

The team from UC San Diego followed 1,032 pregnant women across the United States and Canada who either chose to receive an influenza vaccine or were not vaccinated during one of the three seasons from 2009-2012. Women were recruited through MotherToBaby, a service of OTIS.

Chamber's team found that women vaccinated during pregnancy were no more likely to experience miscarriage, have a baby born with a birth defect or have a baby born smaller than normal compared with those who did not receive a vaccination. Although vaccinated women were more likely to have their babies before term, on average these infants were delivered three days earlier than those born to unvaccinated women.

The VAMPSS team from Boston University's Slone Epidemiology Center interviewed 4,191 mothers from four regional centers in the United States, who had either delivered a baby with one of 41 specific birth defects or delivered a normal infant. They compared the use of influenza vaccine in the two groups during the 2009-2011 seasons. The team also compared the risk of preterm delivery in vaccinated versus unvaccinated women. Overall, no significant evidence of an increased risk of any specific birth defects was noted. While the team did observe a slight increase in preterm delivery rates among pregnant women who received the H1N1 vaccine specifically during the 2009-2010 season, vaccinated women overall only delivered an average of two days earlier compared to the unvaccinated group. For those vaccinated during 2010-2011, the situation was reversed, and vaccinated women were less likely to deliver a preterm baby.

"We found no meaningful evidence of an increase in risk for many specific major birth defects if a woman received the flu shot early in pregnancy," said Carol Louik, ScD, lead investigator of the Boston University team. "A concern about the risk of specific birth defects was a critical question that has not been considered very much until now, and our data are reassuring."

Source: Eurekalert
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
News Category
What's New on Medindia
Printed Temperature Sensors help with Continuous Temperature Monitoring
Health Benefits of Giloy
Breast Cancer Awareness Month 2021 - It's time to RISE
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Trimester of pregnancy Pregnancy and Exercise Hib Vaccine Home Pregnancy Test Pregnancy Psychological Changes In Pregnancy Drugs in Pregnancy and Lactation Breech Presentation and Delivery Air travel: To fly or not to fly Pregnancy and Antenatal Care 

Recommended Reading
Scientists Attempt To Predict Infectious Influenza
According to a report, a new computer model could help scientists predict when a particular strain ....
Interleukin-22 and Post-Influenza Bacterial Superinfection
Interleukin-22 protects against bacterial superinfections that can arise following influenza, ......
H7N9 Influenza Strain Resistant to Antivirals, but Tests Fail to Identify Resistance: Study
Some strains of the avian H7N9 influenza that emerged in China this year have developed resistance ....
Air travel: To fly or not to fly
Air travel is for everyone, even those with medical conditions....
Breech Presentation and Delivery
Breech birth or presentation is delivery of the fetus in a bottom or foot-first position. Causes of ...
Drugs in Pregnancy and Lactation
During pregnancy & lactation a nutritious diet, suitable exercise, adequate rest and a tranquil mind...
Hib Vaccine
The Hib vaccine protects children against infections like meningitis and pneumonia that are caused b...
Home Pregnancy Test
A home pregnancy test is a test done to find out if one is pregnant or not in the relative comforts ...
Pregnancy
Detailed look at Early pregnancy Symptoms and easy health solutions during 1st, 2nd and 3rd trimeste...
Pregnancy and Antenatal Care
What is Antenatal care and its importance during pregnancy for mother and baby, with details on the ...
Psychological Changes In Pregnancy
Pregnancy is an experience of growth, change, enrichment and challenge. During the 40 weeks of pregn...
Trimester of pregnancy
Encyclopedia section of medindia explains in brief about confirmation of pregnancy in first ......

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use