We can't let Delta COVID-19 variant take over in US: Anthony Fauci

US' top infectious disease expert Anthony Fauci has warned about the Delta variant of COVID-19 that was first identified in India. He said that the Delta variant accounts for over 6% of the sequenced cases in the US. "In England, B.1.1.7 [Alpha variant] was dominant, and then [Delta] took over. We cannot let this happen in the US," he said.