Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, listens during a news conference in the James S. Brady Press Briefing Room at the White House in Washington, D.C., U.S., on Tuesday, April 13, 2021.
Leigh Vogel | Bloomberg | Getty Images
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 during a White House news conference on the pandemic.
He said delta appears to be “following the same pattern” as alpha, the variant first found in the U.K., with infections doubling in the U.S. about every two weeks.
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