Mild strains of germs are used in v

Mild strains of germs are used in vaccines to artificially activate the immune system to put up a defence against infectious diseases.

Results (Chinese) 1:

病菌弱毒株的疫苗用于人工激活免疫系统把一个防御传染病。

Results (Chinese) 2:

温和的细菌菌株被用于疫苗，人为地激活免疫系统，以抵御传染病。

Results (Chinese) 3:

温和的细菌菌株被用于疫苗中，人工激活免疫系统，以抵御传染病。