An unvaccinated health care worker set off a Covid-19 outbreak at a nursing home in Kentucky where the vast majority of residents had been vaccinated, leading to dozens of infections, including 22 cases among residents and employees who were already fully vaccinated... Most of those who were infected with the coronavirus despite being vaccinated did not develop symptoms or require hospitalization, but one vaccinated individual, who was a resident of the nursing home, died... 26 facility residents were infected, including 18 who had been vaccinated, and 20 health care personnel were infected, including four who had been vaccinated. Two unvaccinated...