Diphtheria and inactivated polio vaccine have also been used extensively.
BBC: Whooping cough vaccine a 'no-brainer' during pregnancy
Children should receive four doses of inactivated polio vaccine, delivered as an injection, at ages 2 months, 4 months, 6 to 18 months, and 4 to 6 years, according to the CDC.
CNN: Why polio hasn't gone away yet
应用推荐
模块上移
模块下移
不移动