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. But an analysis of data from national surveillance systems in Denmark, one of approximately 10 countries where BA.2 has become predominant, suggests reinfections are rare. Researchers used genomic sequencing and other methods and identified 47 cases from where they believe a person suffered from COVID-19 caused by Omicron before getting reinfected with the subvariant. Most of the people, or 89 percent, were not vaccinated, but none needed hospital care and none died. Of those who showed symptoms after getting reinfected, they mainly endured mild disease. Natural immunity, or protection from recovering from COVID-19, may have played a role, the researchers said in the …
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