主动免疫 zhǔ dòng miǎn yì

DEFINITIONS

  1. active immunity

CHARACTERS

主 zhǔ
HSK 3
master, chief owner; host; lord
动 dòng
HSK 2
move, happen; movement, action
免 miǎn
HSK 4
spare; excuse from; evade
疫 yì
HSK 6
epidemic, plague, pestilence