Joan Phillips, a certified nursing assistant in a Florida nursing home, loved her job but dreaded the danger of going to work in the pandemic. When vaccines became available in December, she jumped at the chance to get one. Months later, it appears that danger has faded. After the rollout of Covid vaccines, the number of new Covid cases among nursing home staff fell 83% – from 28,802 for the week ending 20 December to 4,764 for the week ending...