Officials are facing mounting concern that the U.S. is heading toward a summer Covid-19 surge. Omicron’s subvariant, BA-5, is the most contagious version of the virus yet and is now the dominant strain, making up more than 50 percent of new cases. Concern is also growing that cases are being undercounted due to at-home test kits. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC
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Summer Covid-19 Surge May Be On The Horizon, Officials Say