Samples came from six major metropolitan areas: San Francisco, Boston, Minneapolis, Los Angeles, New York City, and Seattle. Overall, they estimated the household secondary attack rate was 16.6%. That is essentially most of America's workforce. Reporting by Nancy Lapid; Editing by Bill BerkrotOur Standards: The Thomson Reuters Trust Principles. It's truly hard to overstate the significance of this finding relative to the perception of the public based on the lies we've been told concerning asymptomatic spread.
In the 2014 study, 5 years of research were related to San Francisco.
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