CAHAN San Diego Alerts

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California Health Alert Network (CAHAN) San Diego Communications (Alerts, Advisories, Updates, and Information)—2021-2024

The County of San Diego Health and Human Services Agency (HHSA) Public Health Services (PHS) Division sends priority health communications to health care and public safety professionals in San Diego County through the California Health Alert Network (CAHAN) San Diego. Topics include communicable diseases outbreaks, emerging health issues, requests for heightened surveillance related to communicable diseases, recommendations on communicable disease identification, prevention, infection control, specimen submission and laboratory testing, and emergency preparedness information.

To receive CAHAN San Diego communications, click the “Subscribe to CAHAN San Diego” button. It takes only a few minutes to sign up. PHS will not share your contact information.

CAHAN San Diego Communication Types

Alert: Conveys the highest level of importance: warrants immediate action or attention.

Advisory: Provides important information for a specific incident or situation; may not require immediate attention.

Update: Provides updated information regarding an incident or situation; unlikely to require immediate action.

Information: Provides general information that is not necessarily considered to be of an emergent nature.

See below, or click the following links, to learn view CAHAN communications:

2024 CAHAN Communication

2023 CAHAN Communication

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 Update #1: Respiratory syncytial virus (RSV): Shortage of RSV Monoclonal Antibody, Nirsevimab.

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: Limited Availability of Nirsevimab in the United States, Interim CDC Recommendations

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 Alert: Gastrointestinal Illnesses Due to Salmonella spp. Linked to Dairy Products Produced by Raw Farm, LLC

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: Listeria Associated with Soft Serve Ice Cream Distributed to Long-Term Care Facilities

Health Advisory—July 27

Health Advisory: Silicosis in Countertop Workers

Health Advisory—June 23

Health Advisory: Request to Submit Specimens from Patients Receiving Intensive Care for Influenza A to Public Health Laboratories

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 Update #1:  Increased Hepatitis A Cases Associated with Homelessness, Drug Use in San Diego County

Health Advisory—May 9

Health Advisory: Doxycycline Post-Exposure Prophylaxis for Prevention of Bacterial Sexually Transmitted Infections

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 Update #6: Identification, Laboratory Testing, Management and Treatment, and Vaccination for Mpox Virus Infection in California

Health Advisory—April 7

Health Advisory: Elevated Norovirus Activity in California

Health Advisory—March 27

Health Advisory Update #61: COVID-19 Vaccine Update: Bivalent Boosters for Children 6 Months to 4 Years Old Who Have Completed the three-dose Pfizer-BioNTech Primary Series

Health Advisory—March 22

Health Advisory: Recall of Imported Frozen Organic Strawberries following Hepatitis A Investigation in Washington State

Health Advisory—February 28

Health Advisory: Increase in Extensively Drug-Resistant Shigellosis in the United States

Health Advisory—February 10

Health Advisory: Increase in Hepatitis A Virus Infections including Persons Experiencing Homelessness in San Diego County

Health Advisory—February 3

Health Advisory: Outbreak of Extensively Drug-resistant Pseudomonas aeruginosa Associated with EzriCare Artificial Tears

Health Advisory—January 27

Health Advisory Update #60: Coronavirus Disease 2019 (COVID-19): Evusheld No Longer Authorized for Use

2022 CAHAN Communication

Health Advisory—December 15

Health Advisory Update #59: Coronavirus Disease 2019 (COVID-19) Vaccine Update: COVID-19 Bivalent Booster Eligibility Expanded Down to Six Months of Age

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 Advisory Update #57: Coronavirus Disease 2019 (COVID-19): Bivalent Boosters Extended Down to 5 Years of Age

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: Severe Respiratory Illnesses and Acute Flaccid Myelitis Associated with Enterovirus-D68

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 Update #54: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Vaccine Eligibility Down to Six Months of Age

Health Advisory—June 10

Health Advisory: Meningococcal Infections and Monkeypox in Men who Have Sex with Men

Health Advisory—May 24

Health Advisory Update #53: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Pfizer Booster Age Indication

Health Advisory—May 23

Health Advisory: Human Monkeypox

Health Advisory—May 20

Health Advisory: Nationwide shortage of infant formulas may increase risk for inadequate nutrition in infants

Health Advisory: Human Monkeypox

Health AdvisoryApril 22

Health Advisory: Pediatric Hepatitis Associated with Adenovirus Type 41 Infections

Health AdvisoryApril 1

Health Advisory Update #52: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Second Boosters

Health Advisory Update #51: New Federal Program for Oral Antivirals: Test-to-Treat Program in California

Health Advisory—February 25

Health Advisory Update #50: Coronavirus Disease 2019 (COVID-19) Vaccine Updates

Health Advisory—February 24

Health Advisory: Multistate Investigation of Cronobacter sakazakii Infections Associated with Powdered Infant Formula

Health Advisory—February 14

Health Advisory: Dangerous Lead Levels Found in Dried Fruit and Candy Products, California

Health Advisory—February 11

Health Advisory Update #49: Coronavirus Disease 2019 (COVID-19) Addressing Low COVID-19 Vaccination Rates in Children 5-11 Years of Age

Health Advisory—January 11

Health Advisory #48: Coronavirus Disease 2019 (COVID-19) Management of Healthcare Personnel with SARS-CoV-2 Infection or Exposure

2021 CAHAN Communication

2021 CAHAN Communications

Health Advisory—December 29

Health Advisory Update #47: Coronavirus Disease 2019 (COVID-19) Management of Healthcare Personnel with SARS-CoV-2 Infection or Exposure

Health Advisory—December 23

Health Advisory Update #46: Coronavirus Disease 2019 (COVID-19) Oral Treatment, Paxlovid

Health Advisory—December 20

Health Advisory: US Preventive Services Task Force Recommends Screening All Adults under Age 80 for Hepatitis C

Health Advisory—December 15

Health Advisory Update #45: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Pfizer Vaccine Age Indication

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 Update #43: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Pfizer Vaccine Age Indication

Health Advisory—October 26

Health Advisory Update #42: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Expanded Eligibility for COVID-19 Vaccine Booster Doses

Health Advisory—October 14

Health Advisory Update #1: Expansion of Recall of LeadCare® Blood Lead Tests Due to Risk of Falsely Low Results

Health Advisory—October 11

        Health Advisory: Shigella sonnei among persons experiencing homeless in San Diego County

Health Advisory—October 6

Health Advisory Update #41: Coronavirus Disease 2019 (COVID-19) Vaccine Update: COVID-19 Vaccination for Pregnant People to Prevent Serious Illness, Deaths, and Adverse Pregnancy Outcomes from COVID-19

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 Update #40: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Pfizer Vaccine Booster Dosing

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 Update #35: Coronavirus Disease 2019 (COVID-19) Update Myocarditis and Pericarditis after Receipt of mRNA COVID-19 Vaccines

Health Advisory—May 28

Health Advisory: Acute Non-Viral Hepatitis Associated with an
Alkaline Water Product

Health Advisory—May 20

Health Advisory Update #34 Coronavirus Disease 2019 (COVID-19) Update: Expansion of Monoclonal Antibody Indications

Health Advisory—May 13

Health Advisory Update #33: Coronavirus Disease 2019 (COVID-19) Vaccine Update: Pfizer Vaccine Age Indication

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

Update: Ongoing Risk of Highly Drug-Resistant Infections in Patients Following Hospitalization or Invasive Procedures in Mexico

Health Advisory—February 18

Extensively Drug-Resistant Salmonella Typhi Infections Among U.S. Residents Without International Travel

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

Update #21: Coronavirus Disease 2019 (COVID-19) California Crisis Care Continuum Guidelines for General Acute Care Hospitals and State Public Health Officer Order

For more information, contact the Epidemiology Unit at (619) 692-8499 or send us an e-mail.