The subvariant was responsible for an estimated 55% of COVID-19 cases in the country as of March 26.
This part of the story is a little complicated: PCR tests use three primers to detect the coronavirus. With omicron, only two would react, Ko explained. So PCR tests could reliably pick up omicron and, because omicron would appear differently on the test, there was a shortcut to identifying those cases as being caused by that particular variant.to have this same quirk that omicron had. That means BA.2 cases will still show up on a PCR test, but they’ll show up the way previous variants did.
As individuals, there’s not much more you can do than follow the public health guidelines you are already familiar with, Dittmer said. That includes getting vaccinated if you haven’t already, getting boosted if you’re eligible, continuing social distancing and wearing a mask when interacting with others.
If you’re still using a cloth or surgical mask or even if you’re double-masking, now is the time to upgrade, the experts said.published to a preprint server this week , people were less likely to get and spread the BA.2 variant if they were vaccinated than if they were not vaccinated.
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