US vaccine drive complicated by 1st, 2nd dose juggling act

FILE – In this Jan. 27, 2021, file photo, woman asks directions at the entrance to Vista View Park where a COVID-19 vaccination site has opened for second doses in Davie, Fla. As health officials race to vaccinate people across the U.S., the need to give each person two doses a few weeks apart is adding a layer of complexity to the country’s biggest-ever vaccination campaign.