variola virus
Defined in 1 dictionary — U.S. Code
United States Code
18 U.S.C. § 175C — as used in this section (2 versions over time)
As used in this section, the term “variola virus” means a virus that can cause human smallpox or any derivative of the variola major virus that contains more than 85 percent of the gene sequence of the variola major virus or the variola minor virus.