The efficacy and effectiveness of COVID-19 vaccines are not well known in this population. Recent immunogenic studies have found decreased titers of postvaccine neutralizing antibodies against SARS-CoV-2 among NH residents, suggesting the potential for diminished effectiveness in this population.1,2 We report an outbreak of COVID-19 in a French nursing home where most residents had been fully vaccinated with the BNT162b2 vaccine.
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