CDC is finding the Delta strain of Covid-19 seems to be spreading in under vaccinated areas and the Gamma strain of Covid-19 is spreading in areas where there are higher vaccinated rates.
Delta Variant Gains Steam in Undervaccinated U.S. Counties
Early evidence suggests that the highly contagious delta variant, which has prompted concern worldwide as it leads to new surges of Covid-19 across the globe, is spreading in undervaccinated pockets of the U.S.
www.bloomberg.com