When asked about factors that affect viral infectiousness in a recent PolitiFact email interview, Dr. Jaquelin P. Dudley, Associate Director of the LaMontagne Center for Infectious Disease states:
"Viruses, particularly ones with a fatty layer called an envelope, are largely transmitted from person-to-person and not through touching objects."
The season can matter as well. Warm weather, when people are outside rather than in closed rooms, can cut down on transmission, at least on the margins, she said.
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