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Or, if I take that same auditorium and I make it much bigger and put more space between seats, it'll be quieter because it's much harder when you're not in physical contact with people to spread a virus from person-to-person, right? There are all sorts of patterns that we see in epidemiology that help us understand why something spreads.

"What Makes An Idea Go Viral?". "TED Radio Hour" with Guy Raz, www.npr.org. March 4, 2016.
Or, if I take that same auditorium and I make it much bigger and put more space between seats, it'll be quieter because it's much harder when you're not in physical contact with people to spread a virus from