The government ordered that all sailors must be vaccinated before they went to sea , and the doctors of the royal navy were so pleased that there was no more smallpox in the ships that they gave jenner a gold medal 政府命令所有的水手出海之前都要种牛痘，皇家海军的医生对船上没有了天花太高兴了，他们给杰纳颁发了一枚金牌。
