Doctor Ahaorn Sareli receives the Pfizer-BioNTech COVID-19 vaccine at Memorial Healthcare System facility in Miramar, Florida, the U.S., on Monday. The United States started to administer the newly approved coronavirus vaccine produced by Pfizer and BioNTech on Monday, the biggest vaccination campaign in U.S. history. Medical experts have previously advocated for health-care workers to get the vaccine first, followed by vulnerable Americans.SD-Agencies