Other orthpoxviruses that cause infections in humans include variola ( smallpox ) , vaccinia ( used for smallpox vaccine ) , and cowpox viruses 其他导致人类感染的正痘病毒包括天花、牛痘（用于天花疫苗）和牛痘病毒。
2.
It belongs to a group of viruses that includes the smallpox virus ( variola ) , the virus used in the smallpox vaccine ( vaccinia ) , and the cowpox virus 它属于一个包括天花病毒、在天花疫苗中采用的病毒和牛痘病毒的病毒组。
3.
Some compounds made from separate virus strains have been successfully used in vaccines against viruses from the same subfamily , such as smallpox in humans , which is made from cowpox virus , and human measles vaccines for canine distemper in puppies 一些单独的病毒的混合,已经成功做成对抗病毒的疫苗,譬如像人类的天花,是相同的亚科病毒，是利用牛痘病毒做成的，而且人类的麻疹为小狗的大瘟热疫苗。
