‘Stealth omicron’ is on its way. How nervous should we be?
Mighty omicron has morphed into distinct subvariants — including “stealth omicron,” which might be even more infectious. Omicron-specific vaccines are in the works, but may not offer any more protection than what we have now. And there has been talk of a fourth shot, at least for those who are most vulnerable to illness. But…
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