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Can You Get The BA.2 Subvariant If You've Had Covid Recently?

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31.03.2022

BA.2, the newish and highly contagious Omicron subvariant, is now responsible for the majority of new Covid-19 cases sequenced around the world. That isn’t the news anyone necessarily wanted to hear at this point in the coronavirus pandemic, especially those who just had Covid during the Omicron surge.

Can you get BA.2 (sometimes called the “stealth variant”) if you recently recovered from the original Omicron variant or the Delta variant? And if so, how likely is it? Here’s what we know, and don’t, so far.

First, some background on BA.2

Though BA.2 only recently became the dominant Covid variant globally, it’s not new. Researchers first became aware of the subvariant in November and have been tracking it since then. It hasn’t always been easy. Initially, experts had a difficult time tracking BA.2 in PCR tests, which is how it earned its “stealth” nickname.

They know a lot more about it now. BA.2 is more infectious than the original Omicron variant – which itself was more infectious than previous strains, such as Delta. How much more contagious BA.2 is isn’t totally clear yet, but experts have guessed it’s at least 1.5 times more infectious than Omicron was.

The differences between BA.2 and the initial Omicron strain aren’t as big as those between Omicron and Delta. Early evidence also suggests they’re similar in terms of how sick they make people.

The World Health Organisation points to some very........

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