CDC: Delta variant now 10% of US COVID-19 cases

The Centers for Disease Control and Prevention (CDC) yesterday said that Delta, a highly transmissible COVID-19 variant first identified in India and currently sweeping through the United Kingdom, now makes up at least 10% of all US cases. On May 22, the variant had made up only 2.7% of cases. The CDC also now designated Delta as a variant of concern, which means the agency officially recognizes that the variant may carry a risk of more severe illness and transmissibility. In addition to Delta, the CDC has noted five other variants of concern.