Yaw Kesse gets a COVID-19 vaccine from Alexis Watts at Guaranteed Rate Field before the start of the Chicago White Sox game against the Toronto Blue Jays on June 8.
Mandatory Credit:	Scott Olson/Getty Images

Yaw Kesse gets a COVID-19 vaccine from Alexis Watts at Guaranteed Rate Field before the start of the Chicago White Sox game against the Toronto Blue Jays on June 8.
Mandatory Credit: Scott Olson/Getty Images

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Delta variant will likely become dominant Covid-19 strain in US, CDC chief says

The Delta variant of Covid-19 is expected to become the dominant strain in this country, and it's further reason why people need to ramp up the vaccination pace, US Centers for Disease Control and Prevention Director Dr. Rochelle Walensky said Friday.