Legitimate and needy vaccine inoculation is permitted. 允許使用合法且需要的疫苗接種。
Maternal transmission is the primary reason for vaccine failure and is the challenge that needs to be addressed in future vaccination programs. 母嬰傳播是疫苗失敗的主要原因,也是將來(lái)疫苗接種計劃需要考慮的一項挑戰。