EXPLAINER: What to Know About the Delta and Delta Plus Coronavirus Variants.

The article provides information on the highly transmissible delta coronavirus variant in the U.S. Topics discussed include the attribution of more than half of new coronavirus infection in the country as of July to the variant according to the Centers for Disease Control and Prevention (CDC), possible transmission of the variant among unvaccinated people, and the slight reduction in efficacy of coronavirus vaccines authorized in the U.S. in case of the delta variant.