;Vaccination for smallpox is efficacious.
种牛痘防
是有效
。
疫苗；牛痘苗；菌苗病毒Vaccination for smallpox is efficacious.
种牛痘防是有效。
Smallpox can be contained by vaccination.
种牛痘疫苗可以控制
。
A new outbreak of smallpox occurred in 1928.
1928 年爆发了新一轮。
Were you vaccinated against smallpox as a child?
你小时候打过疫苗吗？
The smallpox vaccine has saved many lives.
疫苗挽救了许多人生命。
Cases of smallpox are becoming rare.
病例日益罕见。
In 1742 he suffered a fatal attack of smallpox.
1742 年，他染上了致命。
Were you vaccinated against smallpox as a child?
你小时候打过疫苗吗？
A new outbreak of smallpox occurred in 1928.
1928 年爆发了新一轮。
In 1742 he suffered a fatal attack of smallpox.
1742 年，他染上了致命。
Cases of smallpox are becoming rare.
病例日益罕见。
Smallpox can be contained by vaccination.
种牛痘疫苗可以控制。
Vaccination for smallpox is efficacious.
种牛痘防是有效。
Vaccination immunizes people against smallpox.
种牛痘能使人免患。
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