A COVID-19 outbreak in a French nursing home—where 95% of residents but only a third of healthcare workers were fully vaccinated— infected nearly a quarter of residents and 12% of staff, finds a study today in JAMA Network Open.Nursing home residents may be particularly vulnerable to COVID-19 infections and complications owing to impaired immune function tied to advanced age, congregate living, exposure to rotating unvaccinated healthcare personnel, weaker antibody response to vaccination, and underlying medical conditions such as malnutrition, diabetes, and cancer, the study authors noted.No deaths among vaccinatedThe outbreak occurred in a 77-bed nursing home in Biscarrosse, a town in southwest France, several weeks after the vast