ince the COVID-19 pandemic began, health officials have warned that the biggest barrier to controlling the virus would be its ability to mutate into ever more infectious and dangerous forms.
But resistance is a feature of BA.2.75.2, which is why health officials are concerned.
The Swedish scientists also reported that virus-fighting antibody levels from blood donors, some of whom had been vaccinated or recently infected with SARS-CoV-2, were five-fold lower against BA.2.75.2 than against the currently dominant Omicron variant, BA.5.
How well do vaccines work against BA.2.75.2 ?
Right now, the picture is incomplete.
Human studies of the latest COVID-19 booster shot—which targets two other Omicron subvariants, BA.4 and BA.5—have not been finished yet, and it’s not clear how effective they will be against BA.2.75.2, either.
In earlier studies against BA.2.75, the results were encouraging.
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