Fauci declares delta variant ‘greatest threat’ to the nation’s efforts to eliminate Covid

White House chief medical advisor Dr. Anthony Fauci said Tuesday the highly contagious delta variant is the “greatest threat” to the nation’s attempt to eliminate Covid-19.

Delta, first identified in India, now makes up about 20% of all new cases in the United States, up from 10% about two weeks ago, Fauci said.