There are years of clinical trials for mRNA vaccines, as well as a countless studies done on SARS-COV viruses. This is just taking some existing technologies a

There are years of clinical trials for mRNA vaccines, as well as a countless studies done on SARS-COV viruses. This is just taking some existing technologies and knowledge of the vaccines and creating a new variant of what's been tested before. Also, we know have well over a year's worth of data on millions of people to look at as well.