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【多选题】
有关卡介苗的叙述正确的是A.
经甲醛处理后的人型结核杆菌
B.
保持抗原性的结核杆菌
C.
失去毒力的人型结核杆菌
D.
保持免疫原性的人型结核杆菌
E.
失去毒力的结核杆菌
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A.
they lack necessary fund to curb drug abuse
B.
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C.
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D.
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