As leaders have shifted to the position that masks and tests are matter of personal choice rather than collective self-preservation, they have implicitly silenced a vital message to the citizenry about how pandemics actually come to an end. It is this: less transmission means fewer mutations; fewer mutations means less variation, the fuel of evolution. Reducing infections, then, puts the brakes on viral evolution.

The combined actions of “letting the virus rip” in a population with varying degrees of protective and waning immunity created by vaccines or previous infections “has led to unprecedented increase in viral diversification in 2022,” as one group of researchers explained in a recent paper published in the International Journal of Molecular Sciences.