It is the darling of two many months, be in same an epidemic prevention station, how to have a plenty of take dose of drop of poliomyelitis live vaccine, have a plenty of take sugar pill.

• 都是两个多月的宝宝；在同一个防疫站；怎么有的是服用脊髓灰质炎活疫苗滴剂；有的是服用糖丸.