[医] 重型天花
1. 重型天花：科 family | 重型天花 Variola major | 重复感染 repeated infection
noun
1. a type of smallpox virus that has a fatality rate of up to 25 percent
Synonym: variola major virus
2. a highly contagious viral disease characterized by fever and weakness and skin eruption with pustules that form scabs that slough off leaving scars