COVID-19 spreads more in households than previously thought

COVID-19 spreads in U.S. households more often than previously thought, according to a new study.

The study, published Friday (Oct. 30) in the journal Morbidity and Mortality Weekly Report, involved 191 people in Tennessee and Wisconsin who lived with someone recently diagnosed with COVID-19. Of these, 102 people become infected within seven days of being enrolled in the study, for a “secondary infection rate” of 53%. (The secondary infection rate is the percentage of exposed people who catch COVID-19 from the first case.) 

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