不好意思，建議您讀一下相關的科普文章，否則沒法交流。謝謝！

最近流行，一直有爭議的是MMR疫苗。

MMR疫苗第一針一般建議是12-15月的時候打。這也是為什麽這次華盛頓周麻疹疫情，有個別還沒有接種的小孩子罹患的原因。

Measles, Mumps, and Rubella (MMR) Vaccination: What Everyone Should Know

 

CDC recommends that people get MMR vaccine to protect against measles, mumps, and rubella. Children should get two doses of MMR vaccine, starting with the first dose at 12 to 15 months of age, and the second dose at 4 through 6 years of age. Teens and adults also should also be up to date on their MMR vaccination.