联邦官员周四报告说,一份剂量的新型疫苗可以充分保护接种人免于感染猪流感,以前预计的疫苗剂量则为两份。
On Thursday, federal officials reported that one dose of the new vaccine, rather than the two they had expected, appeared to fully protect recipients against swine flu.
尽管到目前为止,接种疫苗是保护我们免受新型冠状病毒肺炎感染的最佳方法之一,但它可以更好。
Although vaccination is by now one of the best ways to protect us from COVID-19, it can be better.
到目前为止,接种疫苗是一种简单、安全并有效的方式,可以保护我们免受疾病侵害。
Vaccination is by now a simple, safe and effective way to protect us from the diseases.
This process, I said, this ancient process of taking scabs from patients and introducing them to people you wanted to protect, was called variolation.
这个过程,我想,这个从病人身上取痂,接种到你想保护的人身上的古老过程,叫做天花接种
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