COPENHAGEN – Getting contaminated twice with two totally different Omicron coronavirus subvariants is feasible, however not often occurs, a Danish examine has discovered.
In Denmark, a extra infectious sublineage of the Omicron coronavirus variant generally known as BA.2 has shortly dethroned the “unique” BA.1 variant, which is the most typical worldwide, but it surely has remained unclear whether or not an individual might get contaminated by each variants.
A brand new examine, led by researchers at Denmark’s prime infectious illness authority, Statens Serum Institut (SSI), reveals that individuals contaminated with BA.1 can get contaminated with BA.2 shortly afterwards, however that it's a uncommon incidence.
“We offer proof that Omicron BA.2 reinfections are uncommon however can happen comparatively shortly after a BA.1 an infection,” the examine authors mentioned.
BA.1 and BA.2 differ by as much as 40 mutations. Whereas BA.2 accounts for greater than 88% of circumstances in Denmark, circumstances have began to extend in the UK, South Africa and Norway.
The reinfections largely affected younger, unvaccinated people and solely precipitated gentle illness, none of which led to hospitalisations or deaths, the researchers added.
The examine, which isn't but peer-reviewed, discovered 1,739 circumstances registered between Nov 21, 2021, and Feb 11 this yr, the place individuals had examined optimistic twice between 20 and 60 days aside.
In that interval greater than 1.8 million infections have been registered in Denmark.
From a smaller pattern group, the examine discovered 47 cases of BA.2 reinfections shortly after a BA.1 an infection. The researchers additionally detected much less virus materials on the second an infection, suggesting some immunity was developed from the primary infections.
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