Los Angeles Health Alert Network

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Los Angeles Health Alert Network
Email: lahan@ph.lacounty.gov
Los Angeles Health Alert Network
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The Department of Public Health (DPH) emails priority communications to health care professionals through LAHAN. Topics include local or national disease outbreaks and emerging health risks. To receive LAHAN communications, click the ‘subscribe’ button. It takes less than a minute to sign up. DPH will not share your contact information.

LAHAN Communication Types
Red Box
Alert: Conveys the highest level of importance; warrants immediate action or attention.
Orange Box
Advisory: Provides important information for a specific incident or situation; may not require immediate action.
Yellow Box
Update: Provides updated information regarding an incident or situation; unlikely to require immediate action.
Blue Box
Information: Provides general information that is not necessarily considered to be of an emergent nature.

For COVID-19 resources for health professionals in LA County, click here.

2022 HAN Communications
September 9, 2022
CDC Health Advisory
Severe Respiratory Illnesses Associated with Rhinoviruses and/or Enteroviruses Including EV-D68 – Multistate, 2022 PDF | Web/Mobile
September 9, 2022
LAC DPH Monkeypox Update
Severe Disease, Testing, and Vaccine Eligibility PDF | Web/Mobile
September 8, 2022
LAC DPH COVID-19 Updates
New Booster Recommendations, Observation Period, Co-Administration PDF | Web/Mobile
August 30, 2022
CDC Health Advisory
CDC Health Advisory: Variant Influenza Virus Infections: Recommendations for Identification, Treatment, and Prevention for Summer and Fall 2022 PDF | Web/Mobile
August 23, 2022
LAC DPH Health Advisory
Recent Report of Polio Case in Rockland County, New York PDF | Web/Mobile
August 12, 2022
LAC DPH Health Update
Monkeypox Updates Including Expedited Testing for PEH and Alternative JYNNEOS Dosing PDF | Web/Mobile
August 1, 2022
CDC Health Update
Monkeypox in People with HIV, Children and Adolescents, and People who are Pregnant or Breastfeeding PDF | Web/Mobile
July 29, 2022
CDC Health Update
Update for Clinicians on Testing and Treatment for Monkeypox PDF | Web/Mobile
July 27, 2022
CDC Health Advisory
Melioidosis Locally Endemic in Areas of the Mississippi Gulf Coast after Burkholderia pseudomallei Isolated in Soil and Water and Linked to Two Cases – Mississippi, 2020 and 2022 PDF | Web/Mobile
July 27, 2022
LAC DPH COVID-19 Update
Therapeutics for SNFs, and Novavax PDF | Web/Mobile
July 21, 2022
LAC DPH Health Update
Monkeypox Updates Including Provider Webinar Friday, July 22 PDF | Web/Mobile
July 14, 2022
LAC DPH Monkeypox Update
Vaccine Referrals & Expanded Commercial Laboratories PDF | Web/Mobile
July 12, 2022
CDC Health Advisory
Recent Reports of Human Parechovirus (PeV) in the United States—2022 PDF | Web/Mobile
July 11, 2022
LAC DPH Information
Understanding CA Child Care and School Immunization Requirements and Medical Exemptions PDF | Web/Mobile
July 8, 2022
LAC DPH Health Update
Monkeypox-Commercial Lab Testing, Reporting, & Vaccine Availability PDF | Web/Mobile
July 5, 2022
LAC DPH Health Update
Vaccinating Children 6 Months of Age and Older PDF | Web/Mobile
June 24, 2022
CDPH Health Advisory
Managing Monkeypox Virus Infection in California PDF | Web/Mobile
June 14, 2022
CDC Health Update
Updated Case-finding Guidance: Monkeypox Outbreak-United States, 2022 PDF | Web/Mobile
June 7, 2022
LAC DPH Health Update
Monkeypox Updates and Provider Webinar this Thursday, June 9, 2022 PDF | Web/Mobile
June 1, 2022
LAC DPH Health Update
Isolation and Quarantine for General Public PDF | Web/Mobile
May 27, 2022
LAC DPH Health Alert
Contaminated Ecstasy and Accidental Drug Overdoses PDF | Web/Mobile
May 27, 2022
CDPH Health Advisory
Monkeypox Virus Infection in the United States and Other Non-endemic Countries PDF | Web/Mobile
May 26, 2022
LAC DPH Health Advisory
Florida Meningococcal Outbreak in Gay, Bisexual, and Other MSM and Vaccine Recommendations for LAC PDF | Web/Mobile
May 24, 2022
LAC DPH COVID-19 Vaccine Update
Vaccine Recommendations-Boosters and Staying Up to Date with Doses PDF | Web/Mobile
May 24, 2022
CDC Health Advisory
COVID-19 Rebound After Paxlovid Treatment PDF | Web/Mobile
May 20, 2022
CDC Health Advisory
Monkeypox Virus Infection in the United States and Other Non-endemic Countries PDF | Web/Mobile
May 17, 2022
CDPH Health Advisory
Seasonal Influenza Activity is Increasing in California PDF | Web/Mobile
May 16, 2022
CDPH Health Advisory
CDPH Advises Parents and Caregivers Against Making or Feeding Homemade Infant Formula to Infants PDF
May 12, 2022
CDC Health Update
Updated Recommendations for Adenovirus Testing and Reporting of Children with Acute Hepatitis of Unknown Etiology
May 5, 2022
CDPH Health Update
Update on Test-to-Treat Programs in California PDF | Web/Mobile
April 29, 2022
CDC Health Advisory
Highly Pathogenic Avian Influenza A(H5N1) Virus: Recommendations for Human Health Investigations and Response  PDF Web
April 26, 2022
CDC Health Advisory
Updated Information on Availability and Use of Treatments for Outpatients with Mild to Moderate COVID-19 Who are at Increased Risk for Severe Outcomes of COVID-19
April 21, 2022
CDC Health Advisory
Recommendations for Adenovirus Testing and Reporting of Children with Acute Hepatitis of Unknown Etiology
March 31, 2022
CDPH Health Update
Use of Outpatient COVID-19 Therapeutics in California
March 18, 2022
CDPH Health Update
Federal Test-to-Treat Program in California
March 2, 2022
LAC DPH Health Advisory
Temporary National Shortage of Rifampin Oral Capsules
February 25, 2022
LAC DPH Health Update
Revisions to Evusheld Dosing
February 17, 2022
CDPH Health Update
Distribution and Patient Prioritization for Tixagevimab/Cilgavimab (Evusheld)
February 11, 2022
CDPH State Health Officer Order
Revision of Mandatory Reporting of COVID-19 Results
February 09, 2022
LAC DPH Health Advisory
Availability of Therapeutics for Treatment and Pre-exposure Prophylaxis of COVID-19
February 3, 2022
CDPH Health Advisory
Omicron Variant Update: Therapeutics Changes for Outpatient Treatment of Mild to Moderate COVID-19
January 28, 2022
LAC DPH Health Advisory
Addressing Low COVID-19 Vaccination Rates in Children 5-11 Years of Age
January 8, 2022
CDPH AFL
Guidance on Quarantine and Isolation for Health Care Personnel (HCP) Exposed to SARS-CoV-2 and Return to Work for HCP with COVID-19
January 7, 2022
LAC DPH Health Alert
Surge in Emergency Response System and Emergency Departments
2021 HAN Communications
December 31, 2021
CDC Health Advisory
Using Therapeutics to Prevent and Treat COVID-19
December 30, 2021
LAC DPH Health Advisory
Availability of Molnupiravir and Paxlovid for Treatment of Mild to Moderate COVID-19
December 27, 2021
CDC Health Advisory 
Rapid Increase of Omicron Variant Infections in the United States: Management of Healthcare Personnel with SARS-CoV-2 Infection or Exposure
NOTE: Healthcare Facilities in California must follow the CDPH All Facilities Letter (AFL) 21-08.6: Guidance on Quarantine for Health Care Personnel (HCP) Exposed to SARS-CoV-2 and Return to Work for HCP with COVID-19 released on 12-30-21.
December 27, 2021
CDPH Health Alert
Authorization of Molnupiravir for Treatment of Mild to Moderate COVID-19, Distribution, Patient Prioritization, and Ethical Considerations
December 23, 2021
CDPH Health Alert
Authorization of Paxlovid for Treatment of Mild to Moderate COVID-19, Distribution, Patient Prioritization, and Ethical Considerations
December 20, 2021
LAC DPH/CDC/CDPH Health Advisory
Mitigating COVID-19 Surge with COVID-19 Vaccination and Boosters; mRNA vaccines recommended over J&J
December 8, 2021
CDPH Disease Notification
Act Now Ahead of Influenza Season: Recommendations for Healthcare Providers
December 3, 2021
CDPH Updated Health Alert
SARS-CoV-Virus Variant of Concern B.1.1.529 (Omicron)
December 2, 2021
CDC Health Advisory
New SARS-CoV-2 Variant of Concern Identified: Omicron (B.1.1.529) Variant
December 2, 2021
LAC DPH Health Alert
Outbreaks of Flea-Borne Typhus
November 30, 2021
CDPH Health Alert
SARS-CoV-2 Virus Variant of Concern B.1.1.529 (Omicron)
November 24, 2021
CDC Health Advisory
Increasing Seasonal Influenza A (H3N2) Activity, Especially Among Young Adults and in College and University Settings, During SARS-CoV-2 Circulation
November 5, 2021
CDC Health Update
Update: Expansion of Recall of LeadCare Blood Lead Tests Due to Risk of Falsely Low Results
November 3, 2021
CDC Health Update
Source Identified and Case Definition Established: Multistate Investigation of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis) in Four Patients: Georgia, Kansas, Minnesota, and Texas – 2021
November 2, 2021
CDPH Disease Notification
Anti-SARS-CoV-2 Monoclonal Antibodies
October 27, 2021
LAC DPH Health Update
Booster Doses—Correction and Resources
October 23, 2021
LAC DPH Health Update
Booster Doses
October 22, 2021
CDC Health Update
Source Implicated in Fatal Case in Georgia: Multistate Outbreak of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis) in Four Patients: Georgia, Kansas, Minnesota, and Texas–2021
October 14, 2021
LAC DPH Health Advisory
Foul Odors Reported in the Vicinity of the Dominguez Channel in Carson and Surrounding Communities
October 14, 2021
CDC Health Update
Expansion of Recall of LeadCare Blood Lead Tests Due to Risk of Falsely Low Results
September 29, 2021
CDC Health Advisory
COVID-19 Vaccination for Pregnant People to Prevent Serious Illness, Deaths, and Adverse Pregnancy Outcomes from COVID-19
September 27, 2021
CDPH Health Advisory
Influenza and Respiratory Syncytial Virus Activity and Guidance for Clinicians
September 20, 2021
CDC Health Advisory
Guidance for Clinicians Caring for Individuals Recently Evacuated from Afghanistan
September 14, 2021
CDC Health Advisory
Increases in Availability of Cannabis Products Containing Delta-8 THC and Reported Cases of Adverse Events
September 10, 2021
LAC DPH COVID-19 Update
COVID-19 Vaccine Additional Dose vs Booster and Vaccine Coadministration
August 26, 2021
CDC Health Advisory
Rapid Increase in Ivermectin Prescriptions and Reports of Severe Illness Associated with Use of Products Containing Ivermectin to Prevent or Treat COVID-19
August 14, 2021
LAC DPH COVID-19 Vaccine Update
Additional mRNA Dose for Immunocompromised Persons & LA County Healthcare Worker Vaccine Mandate
August 10, 2021
LAC DPH Health Advisory:
Increased Interseasonal Activity of Respiratory Syncytial Virus in Los Angeles County
August 09, 2021
CDC Health Update:
New Case Identified: Multistate Investigation of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis) in Four Patients: Georgia, Kansas, Minnesota, and Texas — 2021
August 06, 2021
CDPH State Public Health Officer Order:
Health Care Worker Vaccine Requirement (8-5-21)
July 28, 2021
CDPH State Public Health Officer Order:
Unvaccinated Workers in High Risk Settings (7-26-21)
July 27, 2021
CDC Health Advisory
Vaccination to Prevent COVID-19 Outbreaks with Current and Emergent Variants — United States, 2021
July 17, 2021
CDC Health Advisory
Potential Exposure to Person with Confirmed Human Monkeypox Infection — United States, 2021
July 6, 2021
CDC Health Advisory
Recall of LeadCare® Blood Lead Tests Due to Risk of Falsely Low Results
June 30, 2021
CDC Health Advisory
Multistate Investigation of Non-travel Associated Burkholderia pseudomallei Infections (Melioidosis) in Three Patients: Kansas, Texas, and Minnesota—2021
June 10, 2021
CDC Health Advisory
Increased Interseasonal Respiratory Syncytial Virus (RSV) Activity in Parts of the Southern United States
June 1, 2021
LAC DPH COVID-19 Updates
SARS-CoV-2 Testing Guidelines and More
May 28, 2021
CDPH Health Advisory:
Myocarditis and Pericarditis after Receipt of mRNA COVID-19 Vaccines Among Adolescents and Young Adults
May 28, 2021
CDPH Health Advisory:
Bamlanivimab plus Etesevimab No Longer Recommended for Use in California for COVID-19
May 26, 2021
CDPH Disease Notification:
Acute Non-Viral Hepatitis of Unknown Etiology Potentially Associated with an Alkaline Water Product
May 13, 2021
LAC DPH COVID-19 Vaccine Update:
Vaccination for Children and Homebound Persons
April 23, 2021
CDC/FDA Update:
Use of J&J to Resume in LA County
April 13, 2021
CDC Health Alert:
CDC/FDA Recommend that Providers Pause Administration of Johnson & Johnson COVID-19 Vaccine
March 31, 2021
CDC Health Advisory:
Acute Non-Viral Hepatitis of Unknown Etiology Potentially Associated with an Alkaline Water Product
March 26, 2021
LAC DPH Health Update:
School and Childcare Immunizations and Filing Medical Exemptions
March 19, 2021
CDPH Health Alert:
Concerns re: the Use of Bamlanivimab Monotherapy in the Setting of SARS-CoV-2 Variants
March 15, 2021
LAC DPH COVID-19 Update:
Vaccination for People at Higher Risk and Revised Recommendations for the Fully Vaccinated
March 5, 2021
LAC DPH Health Alert:
Ebola Virus Disease Outbreaks in the Democratic Republic of Congo and Guinea
March 3, 2021
LAC DPH Health Alert:
Wound Botulism Cases Associated with Heroin Injection
February 26, 2021
CDPH Health Alert:
SARS-CoV-2 virus variants of concern identified in CA
February 22, 2021
CDPH Information:
Increasing Disseminated Gonococcal Infections in California – Resources including a webinar on 2/23/21
February 18, 2021
LAC DPH COVID-19 Update:
Vaccinated Persons and Quarantine
February 16, 2021
CDPH Health Advisory:
Ongoing Risk of Highly Drug-Resistant Infections in Patients Following Hospitalization or Invasive Procedures in Mexico
February 12, 2021
CDC Health Advisory:
Extensively Drug-Resistant Salmonella Typhi Infections Among U.S. Residents Without International Travel
February 3, 2021
LAC DPH Advisory:
Limitations of SARS-CoV-2 Antigen Tests, Low Influenza Rates, Updates
January 21, 2021
CDPH Vaccine Update:
Providers that Paused Use of Moderna Lot 041L20A COVID-19 Vaccine Can Immediately Resume Administering Doses
January 19, 2021
LAC DPH COVID-19 Information:
Individuals Age 65 and Older and Vaccine MegaPOD Reminder
January 17, 2021
CDPH Recommendation:
That Providers Pause Administration of Moderna's COVID-19 Vaccine Lot 041L20A
January 15, 2021
LAC DPH COVID-19 Information:
Large Scale Vaccination Events for Phase 1A Healthcare Workers- Vaccination and Volunteer Opportunities
2013-20 HAN Communications
To see previously issued health alerts:
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Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.
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