Ominously nicknamed the “stealth variant,” the latest COVID-19 viral version arrives in the United States with the usual uncertainty that accompanies every iteration of the virus. Scientists don’t know enough to predict exactly what the latest might do. This one is just a little different from the omicron strain only now subsiding. Officially dubbed BA.2, it may spread a little more easily than now-waning omicron, some scientists think, and may be a little more effective at eluding the protections vaccines and previous infections provide. So far, indications are it doesn’t make people any sick…

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