Experts Concerned Recent Vaccine Study May be Misleading to Pregnant Women

A recent article published in the academic journal Vaccine may be misleading to pregnant women, according to experts. The article provides puzzling data suggesting an association—not a causal link—between miscarriage and previous receipt of back-to-back annual pH1N1 influenza vaccines. This study is the first of its kind to explore such connection between influenza vaccines and risks during pregnancy, but it is important to note that, at this time, no published data have confirmed an association between miscarriage and influenza vaccines.

The U.S. Centers for Disease Control and Prevention (CDC), the U.S. Advisory Committee on Immunization Practices (ACIP), the American College of Obstetricians and Gynecologists (ACOG), and the study authors continue to strongly recommend universal influenza vaccines for everyone six months and older, including women during any trimester of their pregnancy. Experts have determined the research featured in the recent article to be too weak and preliminary to change the advice established over a multitude of previous rigorous studies that pregnant women should receive an influenza vaccine. Influenza during pregnancy, experts note, can result in a deadly outcome that may cause serious birth defects and miscarriage. The CDC has issued a fact sheet and guidance on the recent article. A commentary article has been issued in Vaccine disputing the original article’s suggested association between vaccines and miscarriage, and ACOG has also issued a statement that it is safe for pregnant women to receive an influenza vaccine.