Wilma Chan Highland Hospital in Oakland is using its ER to initiate immediate treatment for opioid use disorder, aiding in California's broader adoption of emergency department-based interventions using buprenorphine.

Invasive Aedes aegypti mosquitoes, carriers of multiple viruses, were detected in North Concord, reigniting public health concerns, despite ongoing surveillance since their last sighting in Martinez two years ago.

Mosquitoes carrying West Nile virus were found in San José, prompting vector control to schedule a pesticide spray operation for areas within ZIP codes 95112, 95131, and 95133 on Thursday night. Residents are advised to stay indoors.