Los Angeles

Epidemiological Brief

Los Angeles presents an elevated influenza A(H3N2) signal alongside a low-level mpox background. California reported 13,763 weekly influenza cases in EW53 against a 52-week state maximum of 15,854, yielding a normalized score of 86.8/100—the second-highest influenza signal among US host cities this week. Mpox (clade II) added 1 new California case in EW17 (53 cumulative YTD), with a normalized value of 33.3/100. Measles: no new California cases were confirmed in EW18 (22 YTD), with existing clusters appearing contained. No hantavirus detections this week. The composite Santé score is 33.4 (low). While the score falls at the low threshold, the influenza component is near-peak. Venue medical teams should maintain influenza rapid-test capacity and encourage antiviral early-treatment pathways for high-risk attendees. The mpox background warrants that JYNNEOS vaccination access remains available for at-risk communities in the region ahead of mass-gathering events. Measles MMR documentation requirements for venue workers are recommended. Sante Index v0 is a watching signal, not a forecast.

Model v0 · Updated Jun 8, 2026