Avian Influenza (Bird Flu)
Avian influenza (flu) or bird flu refers to the disease caused by infection with avian influenza type A viruses. These viruses spread naturally among wild aquatic birds worldwide. They can also infect domestic poultry and other birds and animals. Bird flu viruses rarely infect humans. However, some human infections with bird flu viruses have occurred.
In 2020, a strain of bird flu called Highly Pathogenic Avian Influenza (HPAI) A(H5N1) virus emerged in Europe, Asia, and Africa. Highly pathogenic means it can cause severe disease and death in infected poultry. H5N1 virus was first identified in North American wild birds in January 2022. This virus has resulted in wild bird infections and poultry outbreaks in many countries, including the United States.
In 2024, the first H5N1 infections in dairy cattle were reported in the United States. Because of the H5N1 outbreaks in poultry and dairy cattle, a small number of H5N1 infections have occurred in people after contact with infected animals. All had mild illness and recovered. Currently, there is no evidence that H5N1 is spreading person to person
The current risk of infection to the general public is low. However, people who have job-related or recreational exposure to infected birds or animals are at greater risk of H5N1 infection and should take precautions to protect themselves against bird flu.
H5N1 has not been detected in people or dairy cattle in Virginia.
Visit the CDC’s website for more information on bird flu.
General Information
Who is at risk for being infected with bird flu?
Human infections with influenza A viruses from animals are uncommon.
People with exposure to infected birds, livestock, or other animals have a greater risk of influenza A virus infection. These include poultry and dairy farm workers, hunters, backyard or hobbyist flock owners, and fair exhibitors.
How can bird flu be prevented?
- Avoid unprotected contact with sick or dead birds, cattle, or other animals. Also avoid unprotected contact with raw milk, feces (poop), animal litter, or other materials potentially contaminated by sick birds or animals.
- Practice good hand washing and cleanliness, especially after contact with animals and surfaces at petting zoos or other farms where animals are able to be touched. Wash your hands often. If soap and water aren’t available, clean your hands with hand sanitizer containing at least 60% alcohol.
- Avoid touching your eyes, nose, or mouth. If you need to touch your face, make sure your hands are clean.
- Cover your mouth and nose with a tissue or your sleeve (not your hands) when coughing or sneezing.
- Cook poultry, beef, and eggs properly and consume pasteurized milk and milk products.
What are the symptoms of bird flu?
Symptoms in humans from bird flu can range from no symptoms to mild illness such as eye redness and mild flu-like symptoms (fever, cough, sore throat, runny nose, body aches, and tiredness). Symptoms can also be more severe (like pneumonia) and require hospitalization. Less common symptoms include diarrhea, nausea, vomiting, or seizures.
Antiviral drugs that are used to treat seasonal flu are also used to treat bird flu infections. They are most effective when taken within 48 hours of when symptoms start.
What should I do if I have symptoms of bird flu?
See a healthcare provider if you become ill (even if symptoms are mild) after coming into contact with sick birds, poultry, cattle, or other animals and let them know of your recent exposure. Stay away from other people (isolate) and do not go to work or school until you have been evaluated. People who have been exposed to bird or swine flu viruses may be given antiviral medications to prevent infection. This will be decided on a case-by-case basis. Either you or your healthcare provider should also notify your local health department for additional guidance and recommendations.
General Information on Bird Flu
Information for Specific Groups
Dairy Farmers
H5N1 bird flu virus has recently been detected for the first time in cows. The virus can infect people who work with infected animals or their byproducts (e.g., raw milk), such as dairy workers.
To date, H5N1 bird flu virus has not been detected in people, dairy cattle, or other domestic animals in Virginia.
VDH recommends that Virginia dairy farmers follow recommended hygiene practices to keep themselves and their herds healthy. This includes:
To download the flyer above, please visit H5N1-Dairy-Farmers
Spanish flyer available at H5N1-Dairy-Farmers-Spanish
Farming is physically and mentally demanding work. Concerns about bird flu might add an additional layer of stress on agricultural producers. Please visit the Virginia Department of Agriculture and Consumer Services (VDACS) website for more information and resources to manage farm stress and improve mental health.
Recent highlights of VDH’s response to this ongoing situation include:
- Working closely with the Virginia Department of Agriculture and Consumer Services (VDACS) and the Virginia Department of Wildlife Resources to monitor the current H5N1 bird flu situation in wild birds and poultry, dairy cows, and other animals. VDH is the lead state agency for human health.
- Monitoring health data and disease trends to rapidly spot indicators of concern.
- Monitoring exposed people if a detection of HPAI A(H5N1) occurs.
- Working closely with the Division of Consolidated Laboratory Services to ensure capacity and preparedness for laboratory testing.
- Engaging in outreach and education with partner organizations and healthcare providers.
- VDH also provided personal protective equipment free-of-charge to workers on dairy farms, poultry farms, and in slaughterhouses to support strategies to maximize protection.
Additional information:
- CDC Information for Farm Workers Exposed to H5N1 Bird Flu
- CDC Interim Guidance for Employers to Reduce Exposure to Novel Influenza A for People Working with or Exposed to Animals
- CDC Information for Employers Providing Personal Protective Equipment to Reduce Exposure to Novel Influenza A
- CDC Highly Pathogenic Avian Influenza A(H5N1) Virus in Animals: Interim Recommendations for Prevention, Monitoring, and Public Health Investigations
- APHIS Highly Pathogenic Avian Influenza Detections in Livestock
- Virginia Department of Agriculture and Consumer Services-Avian Influenza
Poultry Farmers
Bird flu viruses can affect chickens, turkeys, and many other types of birds. Highly pathogenic avian influenza, or HPAI, is often fatal in chickens and turkeys. Poultry producers work closely with veterinarians to strengthen biosecurity practices. Established and enforced biosecurity protocols can help prevent introduction of HPAI and other infectious diseases.
Additional information:
- USDA Defend the Flock
- CDC Interim Guidance for Employers to Reduce Exposure to Novel Influenza A for People Working with or Exposed to Animals
People with Backyard Birds
Keeping backyard birds such as chickens, ducks, geese, guinea fowl, and turkey can be fun and educational. However, owners should be aware that backyard birds can become infected with H5N1. Biosecurity practices are important to protect these birds from bird flu. Backyard birds can also carry other harmful germs that can make people sick.
Biosecurity practices refer to everything you do to keep disease away from your birds, property, and people. Best practices include:
- Washing hands well before and after handling and caring for your birds. If soap and water aren’t available, clean your hands with hand sanitizer containing at least 60% alcohol.
- Wearing dedicated shoes in areas where you house and care for your birds.
- Not eating or drinking in areas where poultry live or roam.
- Keeping wild birds and rodents out of poultry houses and coops.
- Monitoring the health of your birds. Contact your veterinarian or local extension agent if you notice any signs of illness in your birds.
Additional information:
People Handling Wild Birds Suspected of Avian Influenza Infection
If there are multiple bird mortalities on your property, contact Virginia Department of Wildlife Resources (DWR) and your local health department for their awareness and guidance to protect your health. Sick or dead wildlife can be reported to the DWR via the Virginia Wildlife Conflict Helpline at 855-571-9003 or by completing the form at DWR Sick, Injured, Dead Wildlife Reporting System.
Healthcare Providers
Veterinarians
Clinician Outreach
- VDH Clinician Letter Highly Pathogenic Avian Influenza and Pharmacist Influenza Testing – October 8, 2024
- VDH Clinician Letter Highly Pathogenic Avian Influenza Update for Virginia – May 3, 2024
- ASTHO Highly Pathogenic Avian Influenza Scientific Symposium (Recording from 4/25/24)
Patient and Case Evaluation Criteria
Laboratory Testing
Division of Consolidated Laboratory Services (DCLS)
CDC
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- CDC Interim Guidance on Testing, Specimen Collection, and Processing for Patients with Suspected Infection with Novel Influenza A Viruses with the Potential to Cause Severe Disease in Humans
- CDC Guidance to Commercial Laboratories on Increasing Submission of Influenza A and B Positive Samples to State and Local Public Health Laboratories for Additional Subtyping (including H5)
Treatment and Chemoprophylaxis
Infection Control and Personal Protective Equipment (PPE)