1. Prevention and control of seasonal influenza with vaccines;Centers for Disease Control and Prevention (CDC);Morbidity and Mortality Weekly Report,2013
2. Effects of influenza on pregnant women and infants;Rasmussen;American Journal of Obstetrics and Gynecology,2012
3. ACOG Committee opinion no. 558: integrating immunizations into practice;American College of Obstetricians and Gynecologists;Obstetrics and Gynecology,2013
4. Influenza vaccination coverage among pregnant women - United States, 2012-13 influenza season;Centers for Disease Control and Prevention (CDC);Morbidity and Mortality Weekly Report,2013
5. US Department of Health and Human Services Healthy People 2020 http://healthypeople.gov/2020/