EXPLAINER: How have storms affected COVID-19 vaccinations?

FILE – In this Dec. 20, 2020, file photo, FedEx trucks are parked at the loading dock outside the McKesson distribution center in Olive Branch, Miss. Efforts to vaccinate Americans against COVID-19 have been stymied by a series of winter storms and outages in parts of the country not used to extreme cold weather, and hobbled transportation hubs and highways.