Hepatitis Bvaccine的用法和樣例：
例句
- Cost is the main reason why mass vaccination against hepatitis B is not offered, he believes.
他相信成本問(wèn)題是沒(méi)有實(shí)行大規模乙肝疫苗接種的主要原因。 - Hepatitis B vaccine is recommended for all babies so that they will be protected from a serious but preventable disease.
讓所有的嬰孩都接種乙肝疫苗，是為了防止他們感染某種嚴重的卻是可預防的疾病。
