According to the South Coast Air Quality Management District (AQMD), a particle pollution advisory is in effect until Wednesday, June 24 at 12:30 p.m. The smoke from a large structure fire in Boyle Heights that started around 2:30 p.m. on June 17 is impacting air quality in the San Gabriel Valley. A particle pollution advisory indicates that fine particle levels (like smoke or dust) threaten to exceed health standards. Everyone is encouraged to monitor air quality at AirNow.Gov and take...
Health Advisories
LAC DPH Health Advisory: World Cup 2026 and Summer Mass Gatherings
Key Messages A large influx of domestic and international travelers is expected into Los Angeles County from June through July 2026, with highest concentration anticipated between June 12 and July 10 in connection with the World Cup. Healthcare providers should be on increased alert for travel-related emerging and seasonal infectious diseases, including, but not limited to, measles, influenza, mpox, hepatitis A, dengue, chikungunya, and malaria. Providers should report all mandatory diseases to Public Health. Be aware of diseases that are...
CDPH Health Alert: Ebola Disease Outbreak in the Democratic Republic of the Congo and Uganda (5/20/2026)
Key Messages On May 15, 2026, the Democratic Republic of Congo and the Republic of Uganda officially declared an outbreak of Bundibugyo virus disease (BVD), a type of Ebola disease caused by Bundibugyo virus. WHO has declared the Ebola disease outbreaks in DRC and Uganda to be a public health emergency of international concern. As of May 18, the DRC has reported 10 confirmed cases, 336 suspected cases and 88 suspected deaths. The Uganda Ministry of Health has reported two cases of BVD in Kampala, including one death, in travelers from DRC with no known epidemiologic link to other cases. On May 17, 2026, a U.S. citizen in the...
Pasadena Public Health Department Health Advisory: Increase in Pertussis Cases in Pasadena (05/11/2026)
Key Messages The Pasadena Public Health Department (PPHD) is seeing a significant increase in pertussis (“whooping cough”) activity circulating in the community. Pertussis should be considered in patients presenting with prolonged cough, paroxysmal coughing, inspiratory whoop, post‑tussive vomiting, or known exposure. Early appropriate testing, treatment, and prevention measures are essential to reduce further transmission, especially among infants, pregnant people, and other high‑risk groups. Situation PPHD is observing a rise in pertussis cases among Pasadena residents. Pertussis is a highly contagious...
CDPH Health Advisory: Hantavirus Disease Outbreak Among Passengers of the MV Hondius Ship (05/11/2026)
Key Messages An outbreak of Andes virus, a known species of hantavirus, has been reported on a cruise ship in the South Atlantic. This outbreak has a extremely low risk of spread or impact to the general public. As of 8 May, the World Health Organization (WHO) has reported a total of eight cases, including three deaths. As of May 9, CDC has notified CDPH of three California residents who were passengers on the MV Hondius. One passenger has returned to California, and two are being repatriated to a facility in Nebraska for evaluation before returning to California. ...
State and Local Guidance on Novel Coronavirus for Healthcare Providers Issued January 24, 2020
Summary An outbreak of pneumonia in Wuhan, China was reported to the World Health Organization (WHO) on December 31, 2019, and a novel coronavirus was soon identified as the cause. On January 21, 2020, CDC announced the first U.S. case in a Washington state traveler who had returned from Wuhan. The risk of local infection is considered to be low. The Pasadena Public Health Department (PPHD) is closely monitoring the situation and requests medical providers review the California Department of...
Recognizing, Managing, and Reporting Zika Virus Infections in Travelers Returning from Central America, South America, the Caribbean, and Mexico
Distributed via the CDC Health Alert Network Friday, January 15, 2016, 19:45 EST (7:45 PM EST) CDCHAN-00385 Summary In May 2015, the World Health Organization reported the first local transmission of Zika virus in the Western Hemisphere, with autochthonous (locally acquired) cases identified in Brazil. As of January 15, 2016, local transmission had been identified in at least 14 countries or territories in the Americas, including Puerto Rico (See Pan American Health Organization [PAHO] link below for countries and territories...
California Department of Public Health Zika Virus Information for Healthcare Providers issued 2017-09-25
California-Department-of-Public-Health-Zika-Virus-Information-for-Healthcare-Providers-issued-2017-09-25
LA County Department of Public Health Alert Outbreak of Hepatitis A among Homeless and People who use Illicit Drugs 2017-09-19
LA-County-Department-of-Public-Health-Alert-Outbreak-of-Hepatitis-A-among-Homeless-and-People-who-use-Illicit-Drugs-2017-09-19
LA County Department of Public Health Advisory Detection and Prevention of Hepatitis A among Homeless and People who use Illicit Drugs 2017-07-31
LA-County-Department-of-Public-Health-Advisory-Detection-and-Prevention-of-Hepatitis-A-among-Homeless-and-People-who-use-Illicit-Drugs-2017-07-31