California Health Alert Network (CAHAN) San Diego Alerts
See below for previous alerts sent to the San Diego medical and public health community. For alerts sent in 2024-2025, see Current CAHAN San Diego Alerts.
Health Advisory—December 15
Health Advisory: Clade I Mpox Virus in Travelers to the Democratic Republic of the Congo
Health Advisory—November 27
Health Advisory—November 22
Health Advisory: Pertussis Increasing in San Diego County
Health Advisory—November 15
Health Advisory: High Blood Lead Levels in Children Consuming Recalled Cinnamon Applesauce Pouches
Health Advisory—November 3
Health Advisory: Endemic Rocky Mountain Spotted Fever (RMSF) in Baja California Region
Health Advisory—October 26
Health Advisory—October 25
Health Advisory Update #7: Local Increase in Mpox Cases
Health Alert—October 25
Health Alert: Shiga toxin-producing E. Coli Associated with Miguel’s Cocina 4S Ranch
Health Alert—October 20
Health Advisory—September 15
Health Advisory Update #63: COVID-19 Vaccine Update
Health Advisory —August 28
Health Advisory: Boil Water Advisory for Contaminated Water Supply
Health Advisory—August 18
Health Advisory—July 27
Health Advisory: Silicosis in Countertop Workers
Health Advisory—June 23
Health Advisory—June 15
Health Advisory Update #2: Bicillin® L-A Shortage
Health Advisory—June 8
Health Advisory: Fungal Meningitis in U.S. Patients Following Epidural Anesthesia in Mexico
Health Advisory—May 16
Health Advisory Update #6: Potential Risk for Mpox Resurgence
Health Advisory—May 9
Health Advisory—April 27
Health Advisory Update #62: COVID-19 Vaccine Update: Deauthorization of Monovalent mRNA Vaccines
Health Advisory—April 25
Health Advisory: Potential Access Challenges to Bicillin L-A®
Health Advisory—April 10
Health Advisory—April 7
Health Advisory: Elevated Norovirus Activity in California
Health Advisory—March 27
Health Advisory—March 22
Health Advisory—February 28
Health Advisory: Increase in Extensively Drug-Resistant Shigellosis in the United States
Health Advisory—February 10
Health Advisory—February 3
Health Advisory—January 27
Health Advisory—December 15
Health Advisory—November 30
Health Advisory Update #58: Treatment Options for Current COVID-19 Omicron Subvariants
Health Alert—November 8
Health Alert Update #2: Outbreak of Ebola Virus Disease in Central Uganda
Health Advisory—October 28
Health Advisory: Multidrug Resistant Salmonella Newport among Travelers to and from Mexico
Health Advisory—October 27
Health Alert—October 13
Health Alert: Increasing Influenza and Respiratory Syncytial Virus (RSV) Disease in San Diego County
Health Alert—October 7
Health Alert: Outbreak of Ebola Virus Disease in Central Uganda
Health Alert—September 30
Health Alert: Wound Botulism Associated with Black Tar Heroin
Health Advisory—September 20
Health Advisory—September 19
Health Advisory Update #5: Human Monkeypox Treatment with Tecovirimat and Supportive Measures
Health Advisory—September 6
Health Advisory Update #56: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Bivalent Boosters
Health Advisory—August 16
Health Advisory Update #4: Human Monkeypox Vaccination with Jynneos®
Health Advisory—July 29
Health Advisory Update #55: Coronavirus Disease
2019 (COVID-19) Vaccine Update: Novavax Vaccine
Health Advisory—July 15
Health Advisory Update #3: Human Monkeypox, Testing at Commercial Laboratories
Health Advisory—July 14
Health Advisory—June 10
Health Advisory: Meningococcal Infections and Monkeypox in Men who Have Sex with Men
Health Advisory—May 24
Health Advisory—May 23
Health Advisory: Human Monkeypox
Health Advisory—May 20
Health Advisory: Human Monkeypox
Health Advisory—April 22
Health Advisory: Pediatric Hepatitis Associated with Adenovirus Type 41 Infections
Health Advisory—April 1
Health Advisory Update #52: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Second Boosters
Health Advisory—February 25
Health Advisory Update #50: Coronavirus Disease 2019 (COVID-19) Vaccine Updates
Health Advisory—February 24
Health Advisory—February 14
Health Advisory: Dangerous Lead Levels Found in Dried Fruit and Candy Products, California
Health Advisory—February 11
Health Advisory—January 11
Health Advisory—December 29
Health Advisory—December 23
Health Advisory Update #46: Coronavirus Disease 2019 (COVID-19) Oral Treatment, Paxlovid
Health Advisory—December 20
Health Advisory—December 15
Health Advisory—December 2
Health Advisory Update #44: SARS-CoV-2 virus variant of concern B.1.1.529 (Omicron)
Health Advisory—November 5
Health Advisory—October 26
Health Advisory—October 14
Health Advisory—October 11
Health Advisory: Shigella sonnei among persons experiencing homeless in San Diego County
Health Advisory—October 6
Health Advisory—October 4
Health Advisory: Influenza and Respiratory Syncytial Virus Activity and Guidance for Clinicians
Health Advisory—September 28
Health Advisory: Candida auris detected in San Diego County facilities
Health Advisory—September 28
Health Advisory—September 22
Health Advisory: Guidance for Clinicians Caring for Individuals Recently Evacuated from Afghanistan
Health Advisory—August 19
Health Advisory: Increased Interseasonal Activity of Respiratory Syncytial Virus in San Diego County
Health Advisory —August 19
Health Advisory Update #39: Coronavirus Disease 2019 (COVID-19) Vaccine Update
Health Advisory —July 30
Health Advisory Update #38: Coronavirus Disease 2019 (COVID-19) Urgent Need to Increase Vaccination
Health Advisory—July 22
Health Advisory Update #37: Coronavirus Disease 2019 (COVID-19) Monoclonal Antibody Therapies
Health Advisory—July 7
Health Advisory: Recall of LeadCare® Blood Lead Tests Due to Risk of Falsely Low Results
Health Advisory—June 4
Health Advisory Update #36: Coronavirus Disease 2019 (COVID-19) Monoclonal Antibody Therapies
Health Advisory—June 3
Health Advisory—May 28
Health Advisory: Acute Non-Viral Hepatitis
Associated with an
Alkaline Water Product
Health Advisory—May 20
Health Advisory—May 13
Health Advisory—April 26
Health Advisory Update #32: Coronavirus Disease 2019 (COVID-19) Vaccine Update
Health Advisory—April 15
Health Advisory Update #31: Coronavirus Disease 2019 (COVID-19) Vaccine Adverse Events and Update
Health Advisory—April 13
Health Advisory Update #30: Coronavirus Disease 2019 ( COVID-19) Vaccine Update
Health Advisory—April 12
Health Advisory Update #29: Coronavirus Disease 2019 (COVID-19) Vaccine Update
Health Advisory—March 16
Health Advisory Update #28: Coronavirus Disease 2019 (COVID-19) Vaccine Update
Health Advisory—March 15
Ebola Virus Disease Outbreaks Democratic Republic of Congo & Guinea
Health Update—March 2
Update #27: Coronavirus Disease 2019 (COVID-19) Variants
Health Update—March 1
Update #26: Coronavirus Disease 2019 (COVID-19) Vaccine and Monoclonal Antibody Update
Health Update—February 23
Health Advisory—February 18
Health Update—February 2
Update #25: Coronavirus Disease 2019 (COVID-19) Vaccine Updates
Health Update—January 27
Update #24: Coronavirus Disease 2019 (COVID-19) Quarantine Update
Health Update—January 21
Update #23: Coronavirus Disease 2019 (COVID-19) Vaccine Updates
Health Advisory—January 12
Expanded Syphilis Screening Recommendations for Prevention of Congenital Syphilis
Health Update—January 8
Update #22: Coronavirus Disease 2019 (COVID-19) Vaccine Update
Health Update—January 6
Health Update—December 28
Update #20: SARS-CoV-2 Virus Variant Identified in the United Kingdom
Health Advisory—December 16
Leptospirosis outbreak in dogs
Health Update—October 16
Update #19: Updated Coronavirus Disease 2019 (COVID-19) Test Result Reporting Guidance
Health Update—October 7
Health Advisory—August 21
Fentanyl Overdose Deaths Related to Illicit Drug Use
Health Information—August 20
Vector-Borne Illnesses of Public Health Significance
Health Update—August 17
Update #17: UPDATED Coronavirus Disease 2019 (COVID-19) Testing Guidance and Additional Updates
Table: Priority Level for Testing Criteria: Federal, State, and County Recommendations
Health Update—June 12
Update #16: Coronavirus Disease 2019 (COVID-19)
Health Update—June 11
Update #2: E-cigarette, or Vaping, Product Use-Associated Lung Injury (EVALI)
Health Update—May 4
Update #15: Coronavirus Disease 2019 (COVID-19)
Health Update—April 30
Update #14: Coronavirus Disease 2019 (COVID-19)
Health Update—April 23
Update #13: Coronavirus Disease 2019 (COVID-19)
Table: Priority Level for Testing Criteria: Federal, State, and County Recommendations
Health Update—April 17
Update #12: Coronavirus Disease 2019 (COVID-19)
Health Update—April 9
Update #11: Coronavirus Disease 2019 (COVID-19)
Health Update—April 6
Update #10: Coronavirus Disease 2019 (COVID-19)
Health Update—April 3
Update #9: Coronavirus Disease 2019 (COVID-19)
Health Update—April 1
Update #8: Coronavirus Disease 2019 (COVID-19)
Health Update—March 26
Update #7: Coronavirus Disease 2019 (COVID-19)
Health Update—March 19
Update #6: Coronavirus Disease 2019 (COVID-19)
Health Update—March 14
Update #5: Coronavirus Disease 2019 (COVID-19)
Health Update—March 10
Update #4: Coronavirus Disease 2019 (COVID-19)
Health Update—March 5
Update #3: Coronavirus Disease 2019 (COVID-19)
Health Update—February 28
Update #2: Coronavirus Disease 2019 (COVID-19)
Health Update—February 26
Update #3: Mumps in San Diego County
Health Update—February 1
Health Advisory—January 24
Health Advisory—January 10
Health Advisory—December 24
National Increase in Disseminated Gonococcal Infection Cases
Health Advisory—December 4
Severe Myonecrosis and Wound Botulism Associated with Black Tar Heroin
Health Update—November 26
Health Advisory—November 19
Health Update—October 3
Vaping Associated Pulmonary Injury
Health Information—September 25
Disease Reporting Requirement (Title 17) Updates
Health Alert—August 28
Vaping-Associated Pulmonary Injury
Health Information—August 27
Vector-Borne Illnesses of Public Health Significance
Health Alert—August 21
Second Measles Case in San Diego County
Health Alert—August 7
Measles Case in San Diego County
Health Advisory—August 1
Health Information—August 1
Middle East Respiratory Syndrome Coronavirus (MERS-CoV) and the Hajj
Health Update—July 19
Mumps and Acute Parotitis in San Diego
Health Alert—June 29
Shiga toxin-producing Enteric Illnesses Associated with Attendance at County Fair
Health Information—June 26
Animal Rabies in San Diego County
Health Advisory—June 13
Candida auris Detected in California Healthcare Facilities
Health Advisory—June 7
Update #2: Measles Outbreaks in the United States and Overseas
Health Advisory—May 24
Increased Influenza-Like Illness in Local Migrant Shelter
Health Update—April 25
Measles Outbreaks in the United States and Overseas
Health Advisory—March 28
Influenza Season Continues with an Increase in Influenza A(H3N2) Activity
Health Information—March 25
HIV Testing Recommended in All Healthcare Settings
Health Update—March 18
Carbapenem-resistant Pseudomonas aeruginosa Infections after Hospitalization in Tijuana
Health Advisory—March 15
Mumps and Acute Parotitis Cases Increase in San Diego
Health Advisory—February 14
Kawasaki Disease Increased in San Diego
Health Advisory—February 12
Strangulation: Intimate Partner Violence in San Diego County
Health Advisory—January 31
Measles Outbreaks in Washington, New York, and Overseas
Health Advisory—January 25
Infections Associated with Unapproved Stem Cell Injections
Health Alert—January 16
Carbapenem-resistant Pseudomonas aeruginosa Infections after Surgery in Tijuana
Health Alert—October 19
Acute Flaccid Myelitis – Request for Continued Vigilance
Health Alert—September 28
Invasive Meningococcal Disease Outbreak at San Diego State University
Health Advisory - September 14
Fentanyl Overdoses Related to Illicit Drug Use
Health Information - August 31
Hepatitis A Virus (HAV) Vaccination Reminder for Healthcare Providers
Health Information - August 10
Middle East Respiratory Syndrome Coronavirus (MERS-CoV)
Health Information - August 6
Vector-borne Illnesses of Public Health Significance
Health Advisory - June 26
Shigellosis: Updated National Recommendations and Local Case Information
Health Information - May 25
Ebola Virus Disease in Democratic Republic of Congo
Health Update - April 10
Update: Wound Botulism Cases Associated with Black Tar Heroin
Health Advisory - February 16
Pertussis Increasing in San Diego
Health Update - February 15
Update#8: Hepatitis A Virus Outbreak in San Diego County
Health Advisory - January 22
Zika Virus Advisory #11: Current Case Counts and Updated California Testing Guidelines
Health Advisory—December 18
Biotin Supplements Can Cause False Laboratory Results
Health Update—October 31
Update #7: Hepatitis A Virus Outbreak in San Diego
Health Alert—October 9
Wound Botulism Associated with Black Tar Heroin
Health Information—September 27
Hepatitis A Vaccination Recommendations during the Current San Diego County Outbreak
Health Update—September 12
Update #6: Hepatitis A Virus Outbreak in San Diego
Health Information—September 5
Middle East Respiratory Syndrome Coronavirus (MERS-CoV)
Health Information—August 22
Vector-Borne Illnesses of Public Health Significance
Health Update—August 16
Update #5: Hepatitis A Virus Outbreak in San Diego
Health Alert—July 24
Immune Globulin Dosage Increased for Hepatitis A Virus Prophylaxis
Health Update—July 13
Update #4: Hepatitis A Virus Outbreak in San Diego
Health Update—May 31
Update #3: Hepatitis A Virus Outbreak in San Diego
Health Advisory—May 31
Zika Virus Advisory #10–Current Case Counts and Updated Guidance for Pregnant Women
Health Alert—May 23
Potential for Falsely Low Blood Lead Test Results from LeadCare® Analyzers
Health Update—May 10
Update #2: Shigellosis among Men in Southern California
Health Update—May 4
Update #2: Hepatitis A Virus Outbreak in San Diego County
Health Update—April 5
Update: Hepatitis A Virus Outbreak in San Diego County
Health Update—March 10
Limited Availability of Long-Acting Bicillin® Continues
Health Advisory—March 10
Hepatitis A Virus Outbreak Associated with Homelessness, Drug Use in San Diego County
Health Advisory—February 8
Zika Virus Advisory #9–Local Transmission Reported in Baja California
Health Update—January 17
Health Advisory—December 20
Zika Virus Advisory #8 – Updated Case Counts and Provider Actions
Health Advisory—November 14
Zika Virus Advisory #7 – Updated Case Counts and Provider Actions
Health Alert—November 3
Potential Hepatitis A Exposure, Imported Egyptian Strawberries
Health Update—October 24
Update #2: Mumps at Colleges and Universities
Health Advisory—September 30
Health Alert—September 20
Cluster of Shigella flexneri Infections among Men in Southern California
Health Advisory—August 24
Zika Virus Advisory #5 – Updated Interim Guidelines and Case Counts, Actions Requested of Providers
Health Information—August 18
Mosquito-Borne Illness Prevention in San Diego County
Health Update—July 27
Update: Invasive Meningococcal Disease among Men Who Have Sex with Men in Southern California
Health Information—July 5
Disease Reporting Requirement (Title 17) Updates
Health Advisory—June 24
Invasive Meningococcal Disease in Southern California
Health Advisory—May 10
Limited Availability of Long-Acting Bicillin
Health Advisory—April 19
Multistate Outbreak of Infections Caused by Elizabethkingia anopheles
Health Update—April 12
Update: Mumps in Colleges and Universities
Health Advisory—March 25
Health Alert—March 11
Mumps in Colleges and Universities
Health Advisory—February 24
Zika Virus Advisory #3 – New CDC Guidelines and Health Advisory Issued and Case Count Update
Health Advisory—February 5
Zika Virus Advisory #2 – New Guidelines Issued, Provider Conference Call Announcement
Health Advisory—January 29
Health Information—July 21
Vector-Borne Illnesses of Public Health Significance
Health Update—June 23
Update: Middle East Respiratory Syndrome Coronavirus (MERS-CoV)
Health Alert—June 19
Invasive Meningococcal Disease in Men Who Have Sex with Men
Health Alert—March 20
University of Oregon Meningococcal Disease Outbreak
Health Update—February 26
Pertussis Epidemic Continues in San Diego County and California
Health Alert—February 24
Shiga toxin-producing Shigella sonnei Cases in San Diego County
Health Update—February 20
Health Update—January 18
Measles Update #2 – More Potential Public Exposures in San Diego
Health Update—January 15
Measles Update – Potential Public Exposures in San Diego
Health Alert—January 6
Health Update—December 5
Health Advisory—November 7
Aedes aegypti Mosquitoes and Dengue
Health Update—November 7
Health Update—October 8
Travel Histories and Ebola Preparedness
Health Alert—September 19
Enterovirus D68 Detected in Southern California Children with Respiratory Illness
Health Alert—August 18
Health Update—August 11
Pertussis Epidemic in San Diego County and California
Health Advisory—July 24
Wawona Packing Company Fruit Recall and Listeria monocytogenes
Health Advisory—July 9
Chikungunya Case Confirmed in San Diego County Resident
Health Alert—May 23
Tattoo-Associated Nontuberculous Mycobacterium Skin Infections
Health Advisory—May 20
Mercury Poisoning Linked to Use of Skin-Lightening or Acne Creams from Mexico
Health Alert—May 15
Middle East Respiratory Syndrome Coronavirus (MERS-CoV)
Health Update—April 29:
Pertussis Cases Increase in San Diego County
Health Advisory—April 9
Meningococcal Disease Cases Prompt New Immunization Recommendations in Los Angeles County
Health Alert—March 21
Wound Botulism Associated with Drug Injection
Health Update—March 12
New Measles Case Confirmed in San Diego
Health Update—March 6
Two More Measles Cases Confirmed in San Diego
Health Alert—February 21
Measles Case Confirmed in San Diego
Health Update—January 23
Influenza Activity Update and Management of Influenza Outbreaks in San Diego County
Health Advisory—January 3
Health Alert—December 5
Chickenpox Exposure at County North Region Family Resource Center
Health Information—November 25
Tick-borne Disease in San Diego County
Health Alert—October 25
Pertussis Cases Increasing in San Diego County
Health Alert—October 11
San Diego Cases Identified in Multistate, Multidrug-Resistant Salmonella Heidelberg Outbreak
Health Information—August 28
Continuing Nationwide Shortage of Tuberculin Skin Testing (TST) Antigen
Health Update—June 12
Update: Multistate Hepatitis A Outbreak Associated with Frozen Berry Blend – More San Diego Cases
Health Alert—May 31
Local Cases Identified in Multistate Hepatitis A Outbreak Associated with Frozen Berry Blend
Health Advisory—May 2
Novel Avian Influenza A (H7N9) in China
Health Update—April 22
Update #2 – Invasive Meningococcal Disease (IMD) in the California/Baja California Border Region
Health Update—March 27
Update: Meningococcal Disease in the California/Baja California Border Region
Health Alert—January 30
Call the Epidemiology Unit at (619) 692-8499, or send an e-mail, for
more information.
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