New strain. This is why experts tried to limit the spread until people could be vaccinated. The faster and wider the spread, the more mutations you can expect.
https://www.google.com/amp/s/www.livescience.com/amp/us-covid-19-variant-ohio.html
https://www.google.com/amp/s/www.livescience.com/amp/us-covid-19-variant-ohio.html