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COVID-19 Vaccines Vaccination Disease Monitoring Epidemiology Global Health Disease Surveillance Vaccine Efficacy COVID-19 Disease Spread COVID-19 Vaccines

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New COVID-19 Variant NB.1.8.1 Reaches Multiple U.S. States as Vaccine Guidelines Change

A CDC policy update limits routine vaccinations for low-risk populations following detection of the more transmissible NB.1.8.1 strain in several states.