Official websites use .gov
A
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government organization in the United States.
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A lock (
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connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison between two schematic spreading scenarios. A is a fast-then-saturating scenario, which means than the infection spreads rapidly during the early days, and then the infection rate decreases. B is a slow-then-expanding scenario, which means than the infection spreads slowly at the beginning, and then the infection rate increases.
