1) Harris JW : Influenza occuring pregnant women : a statistical study of thirteen hundred and fifty cases. JAMA 72 : 978─980, 1919
2) Widelock D, Csizmas L, Klein S : Influenza, pregnancy, and fetal outcome. Public Health Rep 78 : 1─11, 1963
3) Freeman DW, Barno A : Deaths from Asian influenza associated with pregnancy. Am J Obstet Gynecol 78 : 1172─1175, 1959
4) Greenberg M, Jacobziner H, Pakter J, et al : Maternal mortality in the epidemic of Asian influenza, New York City, 1957. Am J Obstet Gynecol 76 : 897─902, 1958
5) Mullooly JP, Barker WH, Nolan TF : Risk of acute respiratory disease among pregnant women during influenza A epidemics. Public Health Rep 101 : 205─211, 1986
6) Neuzil KM, Reed GW, Mitchel EF, et al : Impact of influenza on acute cardiopulmonary hospitalizations in pregnant women. Am J Epidemiol 148 : 1094─1102, 1998
7) Irving WL, James DK, Stephenson T, et al : Influenza virus infection in the second and third trimesters of pregnancy : a clinical and seroepidemiological study. BJOG 107 : 1282─1289, 2000
8) Hartert TV, Neuzil KM, Shintani AK, et al : Maternal morbidity and perinatal outcomes among pregnant women with respiratory hospitalizations during influenza season.Am J Obstet Gynecol 189 : 1705─1712, 2003
9) Harper SA, Fukud K, Uyeki TM, et al : 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 53 : 1─40, 2004
10) Smith NM, Bresee JS, Shay DK, et al : Advisory Committee on Immunization Practices : Prevention and Control of Influenza : recommendations of the Advisory Committee on Immunization Practices(ACIP). MMWR Recomm Rep 55 : 1─42, 2006
11) Black SB, Shinefield HR, France EK, et al : Vaccine Safety Datalink Workgroup : Effectiveness of influenza vaccine during pregnancy in preventing hospitalizations and outpatient visits for respiratory illness in pregnant women and their infants. Am J Perinatol 21 : 333─339, 2004