HolgerMHow mRNA vaccines workverified_publisherUSA TODAY - Jennifer Borresen, Ramon Padilla and David HeathOnce the SARS-CoV-2 genetic sequence was released scientists immediately started working on a COVID-19 vaccine On Jan. 10, 2020, when Chinese scientists posted online the genetic sequence for SARS-CoV-2, scientists at the National Institutes of Health (NIH) and the University of Texas at Austin knew …