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1,A、B和C 因为口服脊髓灰质炎疫苗是活疫苗,所以妊娠和免疫缺陷状态为禁忌证,腹泻可增加活病毒在肠道中的排泄。口服脊髓灰质炎疫苗的常规初免时间为3月龄。
1, A, B, and C Because oral polio vaccine is a live vaccine, pregnancy and immunodeficiency status are contraindicated and diarrhea increases the excretion of live virus in the gut. The routine initial immunization time for oral polio vaccine is 3 months.