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Study finds faster, wider spread of COVID-19 in US households

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COVID-19 spreads sooner and extra broadly all through U.S. households than beforehand reported, in line with new preliminary analysis from a multicenter examine led by Vanderbilt College Medical Heart researchers and printed in MMWR, a weekly report from the Facilities for Illness Management and Prevention (CDC).

The examine, led by Carlos G. Grijalva, MD, MPH, affiliate professor of Well being Coverage, and H. Keipp Talbot, MD, MPH, affiliate professor of Medication, discovered that 51% of others dwelling within the dwelling with somebody who was optimistic for COVID-19 additionally grew to become contaminated.

“We noticed that, after a primary family member grew to become sick, a number of infections had been quickly detected within the family,” Grijalva mentioned. “These infections occurred quick, whether or not the primary sick family member was a baby or an grownup.”

The examine discovered that no less than 75% of the secondary family infections occurred inside 5 days of the primary individual within the family experiencing signs.

“This preliminary analysis is the primary to intently observe U.S. households via systematic day by day assessments and examine the transmission of coronavirus amongst teams dwelling collectively underneath one roof,” Talbot mentioned. “Different related research have largely been performed overseas, and others have made estimates of family transmission utilizing contact tracing information.”

Related research within the U.S., Europe and Asia have reported that 30%, or much less, of family members additionally grew to become contaminated.

The preliminary findings from this ongoing examine had been collected from households in Nashville, Tennessee, and Marshfield, Wisconsin.

Additionally among the many examine’s findings is that lower than half of family members skilled signs once they first examined optimistic, and plenty of reported no signs all through the 7-day day by day follow-up interval.

The examine outcomes underscore the potential for transmission from symptomatic or asymptomatic contact with family members and the significance of quarantine, Grijlava mentioned. Individuals conscious of latest shut contact with an contaminated individual, reminiscent of family members, ought to quarantine at dwelling and monitor for growth of signs.

As winter approaches, and folks begin spending extra time indoors, it is going to be necessary to organize for potential infections at dwelling.

“Within the absence of an environment friendly method for identification of infections with out regard to signs, these findings counsel that immediate adoption of isolation measures as quickly as an individual feels sick would possibly cut back the likelihood of family transmission,” the authors concluded.

The examine is a collaborative analysis effort involving investigators VUMC, The Marshfield Clinic Analysis Institute and the CDC. Different VUMC researchers embody Natasha Halasa, MD, and Yuwei Zhu, MD, Ahra Kim, Judy King, Dayna Wyatt, Robert Lyons, Carleigh Frazier, Emily Jookar, Karen Malone, Olivia Doak, Sarah Davis, Jorge Celedonio, Rendie McHenry and Claudia Guevara.


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