Greenville Drug Store in Norwich is one of the clinic locations offering walk-up access. No appointments are needed Tuesday, Wednesday and Thursday from 10 a.m. until 2 p.m. Their phone number is 860-889-9857. Carla Andrews received dose one of the Moderna vaccine at the drug store Tuesday. She said she wouldn't have received the shot there if it weren't for the walk-up access. She has been having difficulty finding an appointment on line. "I was just having some issues getting logged in and then every time I had an issue, it gave me time to try to talk myself out of it," said Andrews, who lives in Norwich.