South Carolina public health officials roll out vaccine system upgrade

FILE - In this Wednesday, June 24, 2020 file photo, a volunteer receives an injection at the Chris Hani Baragwanath hospital in Soweto, Johannesburg. This is part of Africa's first participation in a COVID-19 vaccine trial developed at the University of Oxford in Britain in conjunction with the pharmaceutical company AstraZeneca. (Siphiwe Sibeko/Pool via AP)