vaccines
n. 疫苗（vaccine 的复数）
例句
Anti-malarial vaccines are now undergoing trials.
抗疟疾疫苗现在正处于试验阶段。
《柯林斯英汉双解大词典》
My guess is that the chance that these vaccines will work is zero.
我的猜想是这些疫苗将起作用的可能性为零。
Twelve potential vaccines are currently being tested on human volunteers.
12种潜在疫苗目前正在人体志愿者身上测试。
