R1What Is the R.1 COVID-19 Variant? Here's What We Know So Far

Ashley Abramson 1 hr ago

The World Health Organization recently announced the Delta variant has surpassed other mutations of SARS-CoV-2 as the most prominent strain in the world—but researchers have identified another strain, the R.1 variant, that's been responsible for a small number of COVID-19 cases in the United States and worldwide.