Mass vaccination site in Chatham Co. to close early Thursday due to severe weather threat By Blair Caldwell | March 17, 2021 at 4:15 PM EDT - Updated March 17 at 6:53 PM CHATHAM COUNTY, Ga. (WTOC) - Chatham County’s mass vaccination site opened on Wednesday at the Gulfstream facility. Georgia Emergency Management Agency leaders say they can do about 2,000 vaccinations in one day. On their first day, the site just had a few hundred scheduled. “I just have been waiting and waiting and waiting to get this vaccination so I am thrilled to be here,” said Stacey Valant of Savannah, who received a COVID-19 vaccine on Wednesday,