Throughout December 14, 2020–April 10, 2021, information from the HEROES-RECOVER Cohorts,* a community of potential cohorts amongst frontline employees, confirmed that the Pfizer-BioNTech and Moderna mRNA COVID-19 vaccines had been roughly 90% efficient in stopping symptomatic and asymptomatic an infection with SARS-CoV-2, the virus that causes COVID-19, in real-world situations ...