Overall, they estimated the household secondary attack rate was 16.6%. Seattle was the first COVID epicenter in the U.S., and both New York City and Los Angeles would become hotspots during the collection period - meaning unidentified COVID infections were common in these cities. Not surprisingly, the authors found that the household attack rate for SARS-CoV-2 was relatively high compared to other pandemic coronaviruses like SARS and MERS. That is essentially most of America's workforce. In the one minipool that could be tested for infectivity, the virus material was noninfectious, the researchers said.
Having multiple people participate in the research means that the authors are more certain that the virus is infectious.
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Having multiple people participate in the research means that the authors are more certain that the virus is infectious .
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