[The differentiation of variola and vaccinia virus in HeLa- and F1-cell cultures].
D018929:Cell Culture Techniques; D002454:Cell Differentiation; D006367:HeLa Cells; D006801:Humans; D012899:Smallpox / Q000821:virology*; D014615:Vaccinia / Q000821:virology*; D014616:Vaccinia virus; D012901:Variola virus
SMALLPOX/virology; VACCINIA/virology