active immunity
noun [ U ] medicine specialized uk/ˌæk.tɪv ɪˈmjuː.nɪ.ti/ us/ˌæk.tɪv ɪˈmjuː.ə.t̬i/
(身体的)自动免疫(性),主动免疫(性)
the situation in which the body produces its own antibodies (= substances in the blood that fight disease)
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