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An unvaccinated worker infected with a variant of COVID sparked an outbreak in a U.S. nursing home where almost all residents were vaccinated, a study said Wednesday.

Dozens of cases, including 22 among fully vaccinated residents and staff, have highlighted the importance of comprehensive vaccine coverage and preventive measures, according to research released by the Centers for Disease Control and Prevention.

During the March outbreak at a Kentucky state nursing home, 46 cases were identified, with three residents dying, including two who were not vaccinated.

The spread has been attributed to a worker who had symptoms and was not vaccinated. The variant was R.1, which “is not currently identified as a CDC variant of concern or interest,” the paper says.

While the researchers found that the flare-up of the disease demonstrated the vaccine’s potent effect on preventing symptoms of the disease, they also noted its limitations.

“This underscores the importance … that all individuals, including those who have recovered from COVID-19, are vaccinated,” the authors wrote.

“A continued emphasis on strategies to prevent disease transmission, including among vaccinated populations, is also crucial,” they added.

Their results, published along with a study of a similar outbreak in a Chicago nursing home, indicated the results of mixing vaccinated and unvaccinated people.

Although 90 percent of the 83 Kentucky home residents had received their doses, only half of the 116 workers had been vaccinated at the time of the outbreak.

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Quote: COVID study probes in people vaccinated in the US nursing home (2021, April 22), accessed on April 22, 2021 from https://medicalxpress.com/news/2021-04-probes-covid-vaccinned-nursing-home.html

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