Vaccine development has yielded encouraging result on phase I human trial, demonstrating high immunogenicity and good tolerance when monovalent vaccine was given to women of reproductive age.

• 疫苗方面也有令人鼓舞的关于I期人体试验的结果；证明给育龄期妇女单价疫苗有高的免疫反应和好的耐受性。