Adverse reaction of influenza A (H1N1) 2009 virus vaccination in pregnant women and its effect on newborns.

Pregnant women are reluctant to be vaccinated during their pregnancy. Their main concern is the safety of influenza vaccine. We investigated the adverse reactions of pregnant women who received the influenza A (H1N1) 2009 virus vaccination and also conditions of neonates of the vaccinated women. Various adverse reactions developed after vaccination, but the symptoms were mild and resolved within several days without requiring any treatment or hospitalization.