Andrew Noymer, [associate] public health professor at the University of California, Irvine, agrees that there’s still a surprising amount of delta fueling the rise in cases in the state. But he said without regular sequencing of variants in our county, it’s impossible to know. He said the county’s test-positivity rate doubling looks like a sign it could be omicron. … “We’re all in for a pretty big wave in January,” he said. He added the next surge won’t be as bad as last January, thanks to vaccinations.