White House COVID-19 Response Coordinator Dr. Ashish Jha speaks during the daily briefing at the White House in Washington, April 26, 2022. Speaking to the Associated Press, Jha said Americans' immune protection from the virus is waning and the virus is adapting to be more contagious, and that booster doses for most people will be necessary — with the potential for enhanced protection from a new generation of shots. (AP Photo/Susan Walsh, file)
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