COVID-19 survivors may only need one vaccine dose because they already have high levels of antibodies, study suggests

People previously infected with coronavirus may only need one dose of the vaccine, a new study suggests. Researchers found that participants who had contracted COVID-19 in the past and received one shot had antibody levels similar to - and even higher than - those who had never been infected and were given two doses. Additionally, virus survivors were more likely to report side effects after being immunized such as pain at the injection site, fever and fatigue. The team, from the Icahn School of Medicine at Mount Sinai in New York, says giving previously infected individuals only one dose would 'spare them from unnecessary pain and free up many urgently needed vaccine doses.'