Definition: an injection of a substance that protects you against a disease Level: C2
所有儿童都接种了脑膜炎疫苗。
All the children are given a meningitis ___vaccination.
得益于疫苗接种，发展中国家的公共卫生显著改善。
Thanks to ___vaccination, public health has improved significantly in developing countries.
广泛的疫苗接种使人们能够活得更长久、更健康。
Widespread ___vaccination has enabled people to live longer and healthier lives.
