Sonja J. Olsen,1 Sara A. Mirza,1 Phouvanh Vonglokham,2 Viengphone Khanthamaly,3 Bounlap Chitry,4 Vathsana Pholsena,5 Visith Chitranonh,6 Saad B. Omer,7 Ann Moen,1 Joseph S. Bresee,1 Andrew Corwin,3,8 and Anonh Xeuatvongsa2
Background. Some studies suggest that maternal influenza vaccination can improve birth outcomes. However, there are limited data from tropical settings, particularly Southeast Asia. We conducted an observational study in Laos to assess the effect of influenza vaccination in pregnant women on birth outcomes.