;
;The smallpox vaccine has saved many lives.
疫
挽救了许多人的生命。
疫；
；菌病毒The smallpox vaccine has saved many lives.
疫挽救了许多人的生命。
A new outbreak of smallpox occurred in 1928.
1928 年爆发了新一轮的。
Were you vaccinated against smallpox as a child?
你小时候打过疫吗？
In 1742 he suffered a fatal attack of smallpox.
1742 年，他染上了致命的。
Smallpox can be contained by vaccination.
种疫可以控制住。
Cases of smallpox are becoming rare.
病例日益罕见。
Vaccination immunizes people against smallpox.
种能使人免患。
Vaccination for smallpox is efficacious.
种防是有效的。
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