All appointments booked for McLeod Health vaccine event at Myrtle Beach Convention Center All appointments booked for McLeod Health vaccine event at Myrtle Beach Convention Center By WMBF News Staff | February 23, 2021 at 8:33 AM EST - Updated February 23 at 9:23 PM MYRTLE BEACH, S.C. (WMBF) – It took less than a day for thousands of appointments to be booked for the mass vaccination event at the Myrtle Beach Convention Center. Just before 4 p.m. Tuesday, the Department of Health and Environmental Control’s website showed that no more appointments were available for Tuesday, March 2 and Wednesday, March 3. But McLeod Health announced after the appointments were booked that they’re working to add more appointment times for the mass vaccination events in Myrtle Beach.