Seven unique variants of coronavirus found across United States
The exact origins of each of the viral mutation lineages are yet to be discovered. Some of the strains are prominent across the Midwest, others across the coasts.
A sign saying 'COVID-19 VAX' is seen outside Citi Field, the home stadium of the MLB's New York Mets, one day ahead of the opening of a portion of the baseball park as a COVID-19 mass vaccination site in Queens, New York(photo credit: BRENDAN MCDERMID/REUTERS)ByZACHARY KEYSER
