Reinfections With Subvariant of Omicron Are Rare, Danish Researchers Find

Undated colorized scanning electron micrograph of a cell (blue) heavily infected with COVID-19 particles (red), isolated from a patient sample at the NIAID Integrated Research Facility in Fort Detrick, Md., on Oct. 31, 2020. NIAID

People who contract cases of COVID-19 caused by the Omicron virus variant are unlikely to get re-infected by a subvariant of the variant, researchers in Denmark found.

Emerging data indicate BA.2, a subvariant of Omicron, is more transmissible—possibly 30 percent more, according to the World Health Organization.