At Fountain Valley Regional Hospital in Orange County, the average age of people admitted for hospital treatment in January was 64. Now it’s 46, Dr. Timothy Korber, the hospital’s medical director of emergency services, said recently. Dr. Rais Vohra, Fresno County’s interim health officer, said people are “in so much danger if you’re not vaccinated right now.” “We really are seeing just many, many people that are unvaccinated — young people, in their 20s, 30s and 40s — that are landing in the hospitals right now,” Vohra said. “That could be you. That could be someone that you love, someone that you know.” In Orange County, “the overall pattern is that it’s the 30-, 40-, 50-year-olds who are getting hospitalized, compared to previous surges when it’s really been 65 and over,” Dr. Regina Chinsio-Kwong, a deputy health officer, said at a briefing last week.