Objective: to observe clinical reactions and immune responses of combined vaccinations of mumps and hepatitis a, rubella vaccine, diphtheria-tetanus toxoids respectively.

目的：观察腮腺炎疫苗分别与甲肝、白破、风疹疫苗同时接种的临床反应和免疫效果。

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The US has been offering a combined whooping cough, tetanus and diphtheria vaccine to pregnant women for the past 18 months.

BBC: Whooping cough vaccine a 'no-brainer' during pregnancy