1. Yates L, Pierce M, Stephens S, Mill AC, Spark P, Kurinczuk JJ, et al. Influenza A/H1N1v in pregnancy: an investigation of the characteristics and management of affected women and the relationship to pregnancy outcomes for mother and infant. Health Technol Assess. 2010; 14:109–182.
2. Dodds L, McNeil SA, Fell DB, Allen VM, Coombs A, Scott J, et al. Impact of influenza exposure on rates of hospital admissions and physician visits because of respiratory illness among pregnant women. CMAJ. 2007; 176:463–468.
3. Schanzer DL, Langley JM, Tam TW. Influenza-attributed hospitalization rates among pregnant women in Canada 1994-2000. J Obstet Gynaecol Can. 2007; 29:622–629.
4. Omer SB, Goodman D, Steinhoff MC, Rochat R, Klugman KP, Stoll BJ, et al. Maternal influenza immunization and reduced likelihood of prematurity and small for gestational age births: a retrospective cohort study. PLoS Med. 2011; 8:e1000441.
5. Poehling KA, Szilagyi PG, Staat MA, Snively BM, Payne DC, Bridges CB, et al. Impact of maternal immunization on influenza hospitalizations in infants. Am J Obstet Gynecol. 2011; 204:6 Suppl 1. S141–S148.
6. Wutzler P, Schmidt-Ott R, Hoyer H, Sauerbrei A. Prevalence of influenza A and B antibodies in pregnant women and their offspring. J Clin Virol. 2009; 46:161–164.
7. Harper SA, Fukuda K, Uyeki TM, Cox NJ, Bridges CB. Centers for Disease Control and Prevention (CDC). Advisory Committee on Immunization Practices (ACIP). Prevention and control of influenza: recommendations of the Advisory Committee on Immunization Practices (ACIP). MMWR Recomm Rep. 2004; 53(RR-6):1–40.
8. Influenza vaccines. Wkly Epidemiol Rec. 2005; 80:279–287.
10. Jamieson DJ, Honein MA, Rasmussen SA, Williams JL, Swerdlow DL, Biggerstaff MS, et al. H1N1 2009 influenza virus infection during pregnancy in the USA. Lancet. 2009; 374:451–458.
11. Creanga AA, Johnson TF, Graitcer SB, Hartman LK, Al-Samarrai T, Schwarz AG, et al. Severity of 2009 pandemic influenza A (H1N1) virus infection in pregnant women. Obstet Gynecol. 2010; 115:717–726.
12. Kim MJ, Lee SY, Lee KS, Kim A, Son D, Chung MH, et al. Influenza vaccine coverage rate and related factors on pregnant women. Infect Chemother. 2009; 41:349–354.
13. Kim IS, Seo YB, Hong KW, Noh JY, Choi WS, Song JY, et al. Perception on influenza vaccination in Korean women of childbearing age. Clin Exp Vaccine Res. 2012; 1:88–94.
14. Korea Centers for Disease Control and Prevention. Guidelines of vaccination for adult [Internet]. Cheongju: Korea Centers for Disease Control and Prevention;2012. cited 2014 Apr 11. Available from:
http://www.cdc.go.kr.
15. Blanchard-Rohner G, Meier S, Ryser J, Schaller D, Combescure C, Yudin MH, et al. Acceptability of maternal immunization against influenza: the critical role of obstetricians. J Matern Fetal Neonatal Med. 2012; 25:1800–1809.
16. Yudin MH, Salaripour M, Sgro MD. Pregnant women's knowledge of influenza and the use and safety of the influenza vaccine during pregnancy. J Obstet Gynaecol Can. 2009; 31:120–125.
17. Yudin MH, Salripour M, Sgro MD. Impact of patient education on knowledge of influenza and vaccine recommendations among pregnant women. J Obstet Gynaecol Can. 2010; 32:232–237.
18. Baek JH, Seo YB, Choi WS, Kee SY, Jeong HW, Lee HY, et al. Guideline on the prevention and control of seasonal influenza in healthcare setting. Korean J Intern Med. 2014; 29:265–280.
19. Panda B, Stiller R, Panda A. Influenza vaccination during pregnancy and factors for lacking compliance with current CDC guidelines. J Matern Fetal Neonatal Med. 2011; 24:402–406.
20. Blanchard-Rohner G, Siegrist CA. Vaccination during pregnancy to protect infants against influenza: why and why not? Vaccine. 2011; 29:7542–7550.
21. Cha SH. The history of vaccination and current vaccination policies in Korea. Clin Exp Vaccine Res. 2012; 1:3–8.