Berkeley faces a leptospirosis outbreak among pets and rats at a local homeless encampment, posing health risks to residents. Officials urge relocation and cautionary measures.

San Mateo County confirmed an unvaccinated adult with measles after international travel; investigators are tracing contacts and no further symptomatic cases have been reported.

Sonoma County issues advisory against wild mushroom consumption after a resident dies and poisonings surge, including cases requiring liver transplants.

Santa Clara County has expanded its Nurse Navigator Program across all jurisdictions, enhancing 911 services by offering non-critical care options to callers and reducing the strain on emergency departments and ambulance services.

San Mateo County reports a flu-related adolescent death, with the patient not having received flu shot and the area experiencing increased flu activity. Health officials underscore the importance of vaccination.

Santa Clara Valley Healthcare introduces cardiology services in South County, improving local access to specialized heart care at St. Louise Regional Hospital and Valley Health Center Morgan Hill.

Santa Clara County’s new Behavioral Health Services Center at Valley Medical Center will add 77 beds and youth-focused amenities, with leaders now targeting spring 2026. The project consolidates services and aims to keep more kids in county for care.

The EPA says it will propose a federal limit for perchlorate in tap water after a court order. The agency argues few systems are affected, but testing and public comment will follow.

A UCSF‑led Science study in mice found that fat type — not calories — can tell the brain what season it is, and processed hydrogenated fats can keep animals in a summerlike state. Human effects remain untested.

Contra Costa Health says a confirmed measles case may have exposed shoppers at multiple Walnut Creek stores and the Kaiser emergency department; unvaccinated people should check their status.

California now requires tortillas to be fortified with folic acid to reduce birth defects in the Latino community, where prior folic acid consumption was low.

Santa Clara County pharmacy now vaccinates infants as young as six months, a first in the county for this age group, following specialized training for pharmacists.

Stanford researchers traced a two-step immune reaction that can rarely inflame the heart after mRNA COVID shots and identified lab strategies that blunt the damage. The study reinforces that myocarditis remains uncommon and usually recovers.