South Korean President Moon Jae-in watches as a doctor receives a shot of AstraZeneca's coronavirus disease (COVID-19) vaccine at a public health center in Seoul, South Korea, February 26, 2021.South Korea launched its COVID-19 inoculation campaign on Friday (February 26), with shots to be administered in some 200 nursing homes, in a campaign that officials call the first step in returning the country to more normal life. Yonhap via REUTERS

A nursing home worker receives the AstraZeneca COVID-19 vaccine at a health care centre as South Korea starts a vaccination campaign against the coronavirus disease (COVID-19), in Seoul, South Korea February 26, 2021. The first doses of AstraZeneca's vaccine began to be given at 9 a.m. (0000 GMT) to nursing home staff and some patients at facilities across the country of about 52 million. REUTERS/Heo Ran

South Korean President Moon Jae-in watches as a doctor receives a shot of AstraZeneca's coronavirus disease (COVID-19) vaccine at a public health center in Seoul, South Korea, February 26, 2021. he shots will be administered to 5,266 nursing home staffers and patients in 213 facilities, the Korea Disease Control and Prevention Agency (KDCA) said. Yonhap via REUTERS

A nurse fills a syringe with the AstraZeneca Covid-19 vaccine at a health care centre in Seoul on February 26, 2021, as South Korea starts coronavirus vaccination campaign. Jung Yeon-je/Pool via REUTERS

A nursing home worker has the temperature checked by a medical staff before receiving the AstraZeneca COVID-19 vaccine at a health care centre, as South Korea starts a vaccination campaign against the coronavirus disease (COVID-19), in Seoul, South Korea February 26, 2021. REUTERS/Heo Ran

Nursing home workers wait to receive the first dose of the AstraZeneca Covid-19 vaccine at a health care centre in Seoul on February 26, 2021, as South Korea starts coronavirus vaccination campaign. Jung Yeon-je/Pool via REUTERS