If you've had omicron before, are you safe from infection by the new variants?
NPR, May 5, 2022
Pei-Yong Shi, a virologist at the University of Texas Medical Branch in Galveston, said omicron is really unique because it has an incredible ability to change or evolve in a way that allows it to just zoom past the immune system, and it does this very quickly. “In terms of the ability to evade antibodies, omicron is a master player,” Shi said. “It’s way more efficient than all the previous variants. Like, in this case, sometimes you just need one key mutation there that can totally flip things around.” But Shi emphasized that there's no sign this new variant causes more severe disease compared to the previous omicrons.