The Latest: CDC says US cases down, but 3 variants detected

WASHINGTON — The head of the Centers for Disease Control and Prevention says new COVID-19 cases and hospitalizations are down in recent weeks, but three mutations that are causing concern have been detected in the U.S.
Dr. Rochelle Walensky said Monday at the White House coronavirus briefing that most of the dozens of U.S. cases of coronavirus mutations, or variants, involve the strain first detected in the United Kingdom.
But three cases involving a worrisome mutation first detected in So