英英釋義
n.immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
中文釋義
n.牛痘苗；疫苗
例句
Doctors worried that there would not be enough vaccine for everyone who needed it.
醫生擔心沒有足夠的疫苗給每個需要的人。
There is no vaccine against HIV infection.
現在還沒有防艾滋病病毒傳染的疫苗。
Anti-malarial vaccines are now undergoing trials.
抗瘧疾的疫苗正在試驗階段。
