Covid19
'An irreplaceable loss': US grapples with 1 million COVID-19 deaths – Healio
The first U.S. clinical trial of a COVID-19 vaccine — testing what would become Moderna's FDA-approved messenger RNA vaccine — began in March 2020.
The first U.S. clinical trial of a COVID-19 vaccine — testing what would become Moderna's FDA-approved messenger RNA vaccine — began in March 2020.
