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Delta Covid variant now dominant strain in US
Delta variant is now dominant strain
Highly contagious delta variant now dominant Covid strain in the U.S.
Delta variant now dominant California COVID-19 strain
Delta variant of COVID-19 now dominant strain in Arizona
COVID-19 up; Delta variant now dominant strain
Delta variant now dominant strain in United States
Delta coronavirus variant becomes dominant U.S. strain as experts urge vaccinations
COVID-19 Delta variant now world's dominant strain, more contagious than original
Delta now dominant COVID variant in New Jersey
Delta Variant Becomes Dominant Covid Strain In The U.S.
Highly contagious delta variant on path to become dominant strain in the US
