If one person in a household has Covid-19, there’s a good chance it’ll spread to others — and quickly.A report from the Centers for Disease Control and Prevention, published Friday, took a close look at how the virus spread throughout people’s homes.Full coverage of the coronavirus outbreakThe study included 101 households in Nashville, Tennessee, and Marshfield, Wisconsin. All households had one index patient — a confirmed case of Covid-19. At the time the index patient first reported symptoms, no one else in their household reported any.The 101 index patients (each in their own household) lived with a total of 191 household contacts, 102 of whom — or 53 percent — went on to test positive for Covid-19, according to the report.What’s more, the spread occurred “rapidly,” the authors wrote: “Approximately 75 percent of infections [were] identified within 5 days of the index patient’s illness onset.”The report noted that the age of the index patient didn’t matter — adults, children and teens all spread the virus to others in their households.Family clusters were reported to be a source of spread early on in the pandemic. The first instance of person-to-person spread in the country was between a husband and his wife


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