Body A case of measles has been confirmed in an Orange County resident, an unvaccinated young adult, who had recently traveled internationally. They were not infectious while they travelled. The Health Care Agency’s Communicable Disease Control Division (CDCD) is reaching out to identified contacts. The person was infectious while they visited...

Body The OC Health Care Agency (HCA) was notified by California Department of Public Health (CDPH) and the Los Angeles Department of Public Health (LADPH) of a confirmed measles case in an international traveler who arrived at Los Angeles International Airport (LAX) and visited Orange County (OC). While infectious, the person...

Body A case of measles has been confirmed in an Orange County resident, an unvaccinated toddler who by report has not traveled outside of the area or had known exposures. This case is not linked to the other measles case reported in a traveler due to the timing of illness. The...

Body Key Messages An increase in measles cases has been confirmed in California in recent weeks, with six cases being reported in the last week. Two of those cases were among Orange County residents. Health care providers should consider measles in persons presenting with a fever, rash, and other symptoms consistent...

Body Community urged to ensure immunity (Santa Ana, CA) – The OC Health Care Agency (HCA) received notification of a confirmed case of measles who visited Orange County (OC). While infectious, this individual visited the following OC locations: Thursday, 1/22/26 Disneyland Park, 8 a.m. to 4 p.m. Disney California Adventure Park...

Body The OC Health Care Agency (HCA) received notification of a confirmed case of measles who visited Orange County (OC). While infectious, this individual visited the following OC locations: Disneyland Park, Thursday, January 22 from 8:00 a.m. to 4:00 p.m. Disney California Adventure Park, January 22 from 3:00 p.m. to closing...

Body Measles is the most contagious diseases known—but the good news is that it is preventable. In response to recent cases reported in Orange County and across the region, the OC Health Care Agency (HCA) encourages both health care providers and community members to take simple, proactive steps to stay protected...

Body Key Messages Respiratory Syncytial Virus (RSV) transmission is continuing in California. CDPH recommends continuing RSV immunization of eligible infants and young children with RSV monoclonal antibody products through April 30, 2026. As of 3/7/2026, percent positivity for RSV in Orange County continues to increase week over week. This health alert...

Body March 24 marks World TB Day (WTD) - a day that commemorates Dr. Robert Koch’s 1882 discovery of the tuberculosis (TB) bacterium. At that time, TB was raging through Europe and the Americas, claiming the lives of one out of every seven people. Today, WTD reminds us that tuberculosis remains...

Body The Centers for Disease Control and Prevention (CDC), in conjunction with the White House Office of National Drug Control Policy (ONDCP), is issuing this Health Advisory to notify public health professionals, clinicians, laboratorians, and people at risk for overdose about increasing reports from U.S. jurisdictions detecting medetomidine in the illegal...