Assertion: variola virus's infectivity | /r/HasProperty | maintained at 4°c
Facets:
value: for several months
type: TEMPORAL
Source sentences:
text: The infectivity of the virus is maintained at 4°C for several months and at -20 to -70°C for years(15).
text: The infectivity of the virus is maintained at 4°C for several months and at -20 to -70°C for years(Footnote 15).