If you've had omicron before, are you safe from infection by the new variants?

If you've had omicron before, are you safe from infection by the new variants? When it comes to omicron, one thing seems certain to bioinformatician Shishi Luo: Another surge will occur. That's because new versions of omicron are emerging — here in the United States and in other parts of the world as well, like South Africa. These new variants have a key set of mutations which enable them to ...

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