The delta variant, which was first detected in India and which now makes up 6% of sequenced COVID-19 cases in the United States, has prompted recent calls from President Joe Biden and Dr. Anthony ...

Delta Plus: As U.S. grapples with Delta variant, India raises alarm over a new COVID strain mutated from it By Arshad R. Zargar June 25, 2021 / 7:39 AM EDT / CBS News ...