Andrew Noymer, an epidemiologist and UC Irvine [associate] professor of [public health], concurred. “The hospital number is what’s bothering me,” Noymer said. “It’s a significant increase from last week. … “Omicron is explosive, no doubt about it,” Noymer added. “It does appear to be milder for most people, but the unvaccinated or an unlucky few, particularly elderly people, just watch out.” Noymer also pointed out that the air travel volumes are about at 2019 levels and that will aid in the spread.