COVID-19 vaccine
A COVID-19 vaccine is any of the vaccines used against COVID-19 (a disease caused by the SARS-CoV-2 virus). In July 2020, more than 150 vaccines were being developed in different laboratories. Two mRNA vaccines, one by Pfizer and one by Moderna, were approved late in 2020. Both are over 90% effective. A few vaccines also went into use in early 2021.