Health Alert Network (HAN)
The Health Alert Network (HAN) contains public health information for medical providers, including:
- Up-to-date health alert information, delivered to your inbox and archived on the web
- An online document library on public health topics
- An online community to exchange information and ideas with colleagues
| Emergency Reporting Phone Numbers | ||
|---|---|---|
| General Information: 311 or 877-692-3647 | Bureau of Communicable Disease Reportables: 866-NYC-DOH1 (866-692-3641) | |
| Poison Control: 800-222-1222 or 212-POISONS (212-764-7667) | Terrorism Hotline: 888-NYC-SAFE (888-692-7233) | |
| Office of Emergency Management: 718-422-8700 | Chief Medical Examiner: 212-447-2030 | |
All Health Alerts and Advisories are in PDF format. You need to have Adobe Reader to read PDF files.
Alerts, 2026
Health alerts issued in 2026 will be published here.
Advisories, 2026
CDC's Health Alert Network (HAN)
Alerts Archive
2025
2024
- Alert #6: Protect Your Patients at Risk of Heat-Related Death During Extreme Heat
- Alert #5: Recall of Boar’s Head Deli Meat Due to Possible Contamination with Listeria monocytogenes (NYS)
- Alert #4: Protect Your Patients at Risk of Heat-Related Death During Extreme Heat
- Alert #3: Protect Your Patients at Risk of Heat-Related Death During Extreme Heat
- Alert #2: Protect Your Patients at Risk of Heat-Related Death During Extreme Heat
- Alert #1: Prepare Your Patients at Risk of Heat-Related Death: Extreme Heat Coming
2023
- Alert #24: Increase in Hepatitis A Diagnoses among Men Who Have Sex with Men
- Alert #18: Prepare Your Patients at Risk of Heat-Related Death: Extreme Heat
- Alert #15: Prepare Your Patients at Risk of Heat-Related Death: Extreme Heat Coming
- Alert #9: Guidance During Wildfire Smoke
- Alert #3: Increased Chikungunya Virus Activity in Paraguay and Associated Risk to Travelers
- Alert #2: Increase in Extensively Drug-Resistant Shigellosis in the United States
2022
- Alert #21: West Nile Virus: Record Number of Positive Mosquito Pools in New York City; Two Human Cases Reported
- Alert #20: Update on Poliovirus in New York City
- Alert #19: Extreme Heat Event August 8 and 9, 2022: Help Prevent Heat-Related Deaths
- Alert #17: Extreme Heat Event August 4 and 5, 2022: Help Prevent Heat-Related Deaths
- Alert #14: Extreme Heat Event July 20 and 21, 2022: Help Prevent Heat-Related Deaths
- Alert #8: Test for Legionella in Adults with Pneumonia
- Alert #3: Increases in Gonorrhea and Syphilis Among Females in New York City
Advisories Archive
2025
- Advisory #28: Influenza A(H3) Currently Dominant (PDF)
- Advisory #27: 2025 ACC/AHA Joint Committee Updates Adult Hypertension Guidelines to No Longer Include Race-Based Criteria (PDF)
- Advisory #26: Severe Illnesses Linked to Do-It-Yourself (DIY) Injection of Botulinum Toxin Products from Unlicensed Sources (PDF)
- Advisory #25: Outbreak of Marburg Virus Disease in Ethiopia (NYS) (PDF)
- Advisory #24: Hepatitis B Birth Dose (NYS) (PDF)
- Advisory #23: Recall of Infant Formula Related to Botulism Type A Outbreak (PDF)
- Advisory #22: Community Spread of Clade I Mpox Detected in the U.S. (PDF)
- Advisory #21: Increases in Synthetic Cannabinoid (K2)-Related Emergency Department Visits in NYC (PDF)
- Advisory #20: Ebola Outbreak Caused by Zaire Ebolavirus in the Democratic Republic of Congo (PDF)
- Advisory #19: COVID-19 Immunization Guidance for Children (PDF)
- Advisory #18: COVID-19 Immunization Guidance for Pregnant People (PDF)
- Advisory #17: COVID-19 Immunization Guidance for Adults (PDF)
- Advisory #16: Travel-Associated Infectious Diseases
- Advisory #15: West Nile Virus Detected in New York City Mosquitoes
- Advisory #14: Legionellosis
- Advisory #13: Tick-borne Diseases in New York City
- Advisory #12: Poisoning by Medetomidine and Bromazolam in Suspected Opioid Overdose
- Advisory #11: Reduce Health Impacts Caused By Air Quality Events During Wildfire Season
- Advisory #10: Non-Sterile Ultrasound Gel Contaminated with Paraburkholderia fungorum
- Advisory #9: Help Prevent Heat-Related Illness and Death
- Advisory #8: Ongoing Risk of Dengue Virus Infections and Updated Testing Recommendations
- Advisory #7: Spring is Here: Prepare People with Asthma for Pollen Season
- Advisory #6: Viral Hemorrhagic Fever
- Advisory #5: Measles Activity in the United States and Canada
- Advisory #4: Possible Exposure to Hepatitis A at a Manhattan Restaurant and Routine Hepatitis A Vaccine Recommendations to Prevent Infection
- Advisory #3: Ebola Outbreak Caused by Sudan virus in Uganda
- Advisory #2: Elevated Concentrations of Mercury in Skin Lightening Creams
- Advisory #1: Accelerated Subtyping of Influenza A in Hospitalized Patients
2024
- Advisory #31: Overdose is the Leading Cause of Pregnancy-Associated Death in NYC
- Advisory #30: CDC Health Advisory: First Case of Clade I Mpox Diagnosed in the United States
- Advisory #29: Elevated Levels of Lead, Mercury, Arsenic and Cadmium in Traditional Health Remedies
- Advisory #28: CDC Health Update: Prevention Strategies for Mpox, including Vaccinating People at Risk via Sexual Exposure, for U.S. Travelers Visiting Countries with Clade I Mpox Outbreaks
- Advisory #27: Marburg Virus Disease Outbreak in the Republic of Rwanda
- Advisory #26: Travel-Associated Infectious Diseases
- Advisory #25: CDC Advisory: Increase in Human Parvovirus B19 Activity in the United States
- Advisory #24: Increased Oropouche Virus Activity and Associated Risk to Travelers
- Advisory #23: Discontinue Use of Ciprofloxacin for Invasive Meningococcal Disease Post-Exposure Prophylaxis
- Advisory #22: CDC Alert: Mpox Caused by Human-to-Human Transmission of Monkeypox Virus in the Democratic Republic of the Congo with Spread to Neighboring Countries
- Advisory #21: Pesticide Spraying to Prevent West Nile Virus in New York City
- Advisory #20: Carfentanil and Medetomidine in the NYC Drug Supply
- Advisory #19: Early and Increasing West Nile Virus in Mosquitoes in New York City
- Advisory #18: Pesticide Spraying to Prevent West Nile Virus in New York City
- Advisory #17: CDC Advisory: Increased Risk of Dengue Virus Infections in the United States
- Advisory #16: Legionellosis in NYC
- Advisory #15: NYC Health Department Recommendations on Destigmatizing and Improving Provider Attitudes Towards Pain in Sickle Cell Disease
- Advisory #14: Guidance During Wildfire Smoke
- Advisory #13: Tick-borne Disease Advisory
- Advisory #12: Updates on Mpox in New York City
- Advisory #11: CDC Advisory: Adverse Effects Linked to Counterfeit or Mishandled Botulinum Toxin Injections
- Advisory #10: Continued Increase in Leptospirosis Cases in New York City
- Advisory #9: Help Prevent Heat-Related Illness and Death
- Advisory #8: CDC Advisory: Increase in Invasive Serogroup Y Meningococcal Disease in the United States
- Advisory #7: CDC Advisory: Increase in Global and Domestic Measles Cases and Outbreaks: Ensure Children in the United States and Those Traveling Internationally 6 Months and Older are Current on MMR Vaccination
- Advisory #6: Prepare Patients with Asthma for Pollen Season
- Advisory #5: Increase in Pertussis Cases in New York City
- Advisory #4: Increases in Syphilis Among Females and Congenital Syphilis in New York City
- Advisory #3: Be Vigilant for Measles Cases (NYS)
- Advisory #2: COVID-19 Treatments Transition to Commercial Distribution
- Advisory #1: NYC DOHMH Recommends Masking In Healthcare and Residential Facilities
2023
- Advisory #26: CDC Advisory: Confirmed Rocky Mountain Spotted Fever among People with Recent Travel to Tecate, Mexico
- Advisory #25: CDC Advisory: Mpox Caused by Human-to-Human Transmission of Monkeypox Virus with Geographic Spread in the Democratic Republic of the Congo
- Advisory #23: CDC Advisory: Limited Availability of Nirsevimab in the United States
- Advisory #22: 2023-2024 Updated COVID-19 Vaccines Recommended for Everyone 6 Months of Age and Older
- Advisory #21: CDC Advisory: Locally Acquired Malaria Cases Identified in Florida, Texas, and Maryland
- Advisory #20: CDC Advisory in Partnership with NYS: Increased Respiratory Syncytial Virus (RSV) Activity in Parts of the Southeastern United States: New Prevention Tools Available to Protect Patients
- Advisory #19: CDC Advisory: Severe Vibrio vulnificus Infections in the United States Associated with Warming Coastal Waters
- Advisory #17: Pesticide Spraying to Prevent West Nile Virus Continues in New York City
- Advisory #16: West Nile Virus: Positive Mosquito Pools in New York City
- Advisory #14: Pesticide Spraying to Prevent West Nile Virus in New York City
- Advisory #13: Tick-borne Disease Advisory
- Advisory #12: Poisonings Related to Drinking Poppers (Alkyl Nitrites)
- Advisory #11: Legionellosis in New York State
- Advisory #10: Fungal Meningitis in U.S. Patients Who Underwent Surgical Procedures Under Epidural Anesthesia in Matamoros, Mexico
- Advisory #8: CDC Advisory: Potential Risk for New Mpox Cases
- Advisory #7: Help Prevent Heat-Related Illnesses and Death
- Advisory #6: Increase in Invasive Group A Streptococcal Infections in New York State
- Advisory #5: CDC Advisory: Outbreaks of Marburg Virus Disease in Equatorial Guinea and Tanzania
- Advisory #4: Spring is Here: Prepare Patients with Asthma for Spring Pollen Season
- Advisory #1: CDC Advisory: Outbreak of Extensively Drug-resistant Pseudomonas aeruginosa Associated with Artificial Tears
2022
- Advisory #34: Increase in Pediatric Invasive Group A Streptococcal Infections
- Advisory #33: Xylazine and Fentanyl in the New York City Drug Supply
- Advisory #32: CDC Health Update: Important Updates on COVID-19 Therapeutics for Treatment and Prevention
- Advisory #31: CDC Health Advisory: Interim Guidance for Clinicians to Prioritize Antiviral Treatment of Influenza in the Setting of Reduced Availability of Oseltamivir
- Advisory #30: Update on Managing Monkeypox in Patients Receiving Therapeutics
- Advisory #29: Increased Respiratory Virus Activity, Especially Among Children
- Advisory #28: Prescribe COVID-19 Therapeutics to Prevent Severe Disease, Hospitalization and Death This Winter
- Advisory #27: Travel-Acquired Mosquito-Borne and Enteric Diseases
- Advisory #26: Outbreak of Ebola Virus Disease in Central Uganda
- Advisory #25: CDC Advisory: Severe Manifestations of Monkeypox Among People Who Are Immunocompromised Due to HIV or Other Conditions
- Advisory #24: CDC Advisory: Increase in Severe Respiratory Illnesses Associated with Rhinoviruses and/or Enteroviruses Including EV-D68
- Advisory #23: Pesticide Spraying to Reduce Mosquito Activity and Control West Nile Virus Continues in New York City
- Advisory #22: Poisonings and Death Related to Intentional Sodium Nitrite Ingestions
- Advisory #18: CDC Advisory: Melioidosis Locally Endemic in Areas of the Mississippi Gulf Coast
- Advisory #16: Accessing Tecovirimat for People with Monkeypox
- Advisory #15: Pesticide Spraying to Reduce Mosquito Activity and Control West Nile Virus in New York City
- Advisory #13: Update on Monkeypox in New York City
- Advisory #12: CDC Advisory: Recent Reports of Human Parechovirus (PeV) in the United States — 2022
- Advisory #11: Monkeypox Transmission and Detection in New York City
- Advisory #10: Tick-borne Disease Advisory
- Advisory #9: Help Prevent Heat-Related Illness and Death
- Advisory #7: CDC Advisory: COVID-19 Rebound After Paxlovid Treatment
- Advisory #6: CDC Advisory: Monkeypox Virus Infection in the United States and Other Non-endemic Countries — 2022
- Advisory #5: Spring is Here: Prepare Patients with Asthma for Spring Pollen Season
- Advisory #4: COVID-19 Pre-Exposure Prophylaxis for Immunocompromised Patients and Treatment Updates
- Advisory #2: Paxlovid is Available for COVID-19 Treatment in New York City
- Advisory #1: New York City COVID-19 Isolation and Quarantine Updates