Clinic runs out of second doses of COVID-19 vaccine Mainstreet Family Care runs out of Moderna vaccine By Alan Collins | March 2, 2021 at 5:18 PM CST - Updated March 2 at 5:28 PM BIRMINGHAM, Ala. (WBRC) - About 1,300 people are anxious and wondering if they will get their second dose of the Moderna COVID vaccine after most all of Main Street Urgent Careâs 17 clinics ran out last week. A lot of people are concerned they may miss the deadline for getting the second dose of the vaccine to be effective against COVID-19. A clinic spokeswoman said âdonât worryâ. Main Street Clinics in Alabama and Georgia have been providing vaccinations for weeks now. With the Moderna vaccine, you are supposed to get that second dose after about four weeks. Research has proven you could have up to six weeks for the vaccine to be effective. The clinic ran out because some folks didnât show at the time of the second vaccination.