Scientists say they can outline scenarios for how the virus could evolve, but variants remain Covid’s unknowable wild card. Anyone saying they know for sure what happens next is full of it, says a New York virologist.
As omicron infections accumulate, so will immunity in the population.
As the proportion of omicron cases rises across the world, the chances of a delta resurgence could fall. On the other hand, omicron could also evolve to become more pathogenic or acquire the ability to better replicate in the lungs, Moore said, outlining several in a slew of possibilities., including BA.1, which accounts for most U.S. cases, and BA.2. Some countries, including Denmark, have observed a recent rise in the proportion of BA.2 cases, but it’s not yet clear what effect genetic differences between the subvariants mean for disease severity, transmissibility or immunity.
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