The mu COVID variant has been detected in New Jersey. Here’s what we know about it

“Most of the work behind this concern is in lab studies of the virus,” said Andrew Noymer, an infectious disease expert [and associate professor of population health and disease prevention] at the University of California-Irvine. “We know less about how much of a threat it is at the population level.” Noymer said he is still much more concerned about the delta variant’s ability to spread.  “We just don’t know if mu will knock delta off of its perch,” he said. “Best-case scenario, we don’t need to worry, but in the worst-case scenario, it will make current vaccines marginal.”