Shasta County declares measles outbreak after 8 linked cases; California health officials urge vaccinations amid national surge
Shasta County has declared a measles outbreak after eight confirmed, linked cases traced to an index patient identified Jan. 30, 2026. All cases involved unvaccinated people or those with unknown vaccination status, local officials said.
Key takeaways
- Shasta outbreak: Eight confirmed cases, all linked to a single index patient; rapid contact tracing and early isolation limited further spread — CBS Sacramento.
- Statewide scope: California reported 17 measles cases through Feb. 9, 2026, across multiple counties — see the California Department of Public Health measles page.
- National surge: The U.S. is experiencing its highest measles counts in over 30 years; CDC data show hundreds of recent cases — Centers for Disease Control and Prevention.
- Vaccination guidance: Officials urge checking MMR status; two doses provide ~97% protection — see CDPH guidance here.
Main coverage
Shasta County outbreak details
Shasta County Public Health has classified eight confirmed cases as an outbreak; all are close contacts of the index patient identified on Jan. 30, 2026. Officials say new cases were isolated before they became contagious, helping to limit transmission.
“Quick action and community cooperation helped protect public health,” said Katie Cassidy, Shasta County Public Health Director, praising rapid contact tracing and isolation efforts.
Health officials in Redding and Shasta County published exposure locations and time windows. People present at the listed sites during the specified times are being contacted and monitored; anyone exposed should watch for symptoms and contact public health or their health care provider.
- Ninja Coalition, 900 Dana Drive — Jan. 23, 2:30–5:20 p.m.
- Highland Neighborhood Park, 555 Mill Valley Parkway — Jan. 23, noon–4 p.m.
- Osaka Sushi, 1340 Churn Creek Rd. — Jan. 23, 6:30–10 p.m.
- Former CrossPointe Community Church gym, 2960 Hartnell Ave. — Jan. 24, 1:45–5 p.m.
- Costco, 4805 Bechelli Lane — Jan. 24, 6:30–9 p.m.
- Churn Creek HealthCare clinic, 3184 Churn Creek Road — Jan. 28, 1:45–5 p.m.
The Shasta County health notice and local reporting include the full exposure list and contact guidance; see reporting by CBS Sacramento for details.
Statewide picture and data checks
California’s 17 reported cases through Feb. 9, 2026, reflect a broader national rise. CDPH notes cases in Los Angeles, Orange, San Bernardino, Riverside, Shasta and Napa counties, and warns some cases have links to international travel. Napa County reported its first measles case in nearly 15 years.
The CDC defines an outbreak as more cases than expected or clustering by time, place or behaviors; Shasta’s eight linked cases meet that clustering standard. Some circulating details — for example, unconfirmed reports that two infectious people visited Disneyland on Jan. 22 and Jan. 28 — were not verified in public health releases. Officials urge reliance on official county and state notices for confirmed exposure sites.
Official resources: California Department of Public Health — measles page and CBS Sacramento.
National surge and expert warnings
Public health leaders say the current U.S. measles surge is the worst in decades. Dr. Erica Pan, California’s public health officer, warned that the nation is seeing the highest numbers of measles cases, outbreaks, hospitalizations and deaths in more than 30 years. Low vaccination coverage in some communities is cited as a primary driver.
CDC figures reported 733 confirmed U.S. cases in 20 states as of Feb. 5, 2026, with 92% tied to outbreaks. In 2025 the U.S. recorded over 2,200 cases — the most since elimination was declared in 2000. South Carolina reported one of the largest chains with more than 920 linked cases.
Key national data: Centers for Disease Control and Prevention — measles data; state statement coverage: CDPH CAHAN notice; international reporting: Xinhua/english.news.cn.
How measles spreads and who is at risk
Measles transmits via airborne droplets and can remain infectious in the air up to two hours after an infected person leaves an area. It is extremely contagious: about 90% of susceptible people exposed to measles will become infected. Most recent cases involved unvaccinated individuals or those with unknown vaccination status.
High-risk groups include unvaccinated children, infants too young for routine vaccination, and pregnant people. Measles can be contagious up to four days before rash onset and four days after rash appears.
Public health guidance and vaccination recommendations
California health officials urge residents to verify MMR vaccination status. CDPH guidance highlights:
- Infants 6–11 months traveling internationally should receive an early MMR dose.
- Children 12 months and older should have two doses of MMR at least 28 days apart.
- Adults born in 1957 or later without documented immunity should receive two doses.
Clinicians are advised to isolate suspected cases immediately, use airborne precautions and N95 respirators, report suspected cases by phone to local health departments before confirmation, and test via PCR on throat or nasal swab and urine.
See full clinical and public guidance from CDPH CAHAN and the CDPH measles page: California Department of Public Health — measles.
Past California outbreaks
California previously experienced notable outbreaks, including the 2014–2015 Disneyland-linked event that led to 131 cases across multiple states, and 73 cases in 2019 with 41 tied to outbreak clusters. Those events prompted vaccination campaigns and stricter school immunization enforcement.
Historical reference and context: CDPH — measles history.
Implications for the Inland Empire
Economic: The Inland Empire (Riverside and San Bernardino counties) is already represented in the state case count; public venues may face disruption if exposures are confirmed. Employers should plan for staff absences and increased demand for outpatient visits and testing.
Political & social: Outbreaks often renew debates over vaccination policy and school enforcement. Public health outreach should focus on hard-to-reach groups and vaccine-hesitant communities, with clear, nonjudgmental messaging from trusted local providers to protect infants and pregnant people.
Cultural: Schools, faith groups and community centers may need to review exclusion policies and consider on-site vaccine clinics to improve access.
Practical applications for Inland Empire residents
- Check or locate MMR records through your primary care provider, school, or local health department.
- If traveling (especially internationally), ensure travelers are up to date; infants 6–11 months may need an early dose.
- Watch for symptoms — fever plus rash and cough, runny nose or red eyes — if you were at known exposure sites; call your provider before visiting so clinics can prepare airborne precautions.
- Use local vaccine clinics and consult official resources for updates: CDPH measles page and CDC data.
Reporting and sources
This article draws on local reporting and public health releases. Key sources include:
- CBS Sacramento — Shasta County measles outbreak reporting
- California Department of Public Health — measles information
- CDPH CAHAN — Increase of Measles in California
- Centers for Disease Control and Prevention — measles data and research
- International reporting and state statement coverage (Xinhua/english.news.cn)
Public health agencies update case counts and guidance weekly. Residents with questions should contact their local health department.
