AdvertisementThe omicron variant is cause for concern — but not panic, Biden saysUpdated November 29, 2021Brian NaylorfacebookEmailAnthony Fauci (right), director of the National Institute of Allergy and Infectious Diseases and chief medical adviser to the president, speaks alongside President Biden following a meeting of the COVID-19 response team at the White House on Monday. (Getty Images)This article was originally published on November 29, 2021.