Recently I published an article in Women and Birth on maternal influenza vaccination. We looked at the number of women who are getting the benefits of influenza vaccination every year. We interviewed 2,000 new mothers and asked if they had received an influenza vaccine. We also asked them why they did or why they didn’t. The results showed that more women than ever are getting a flu vaccine while pregnant. In 2014, 40% of women received a flu vaccine during pregnancy, double the number in 2012. But a large number of women are still going unvaccinated. Why?