Bird flu symptoms in people can start with red, irritated eyes, fever or feeling feverish, cough, sore throat, runny nose, body aches, headache, or fatigue. If you have had close contact with sick or dead birds, dairy cattle, raw milk, or an affected animal environment, call a clinician or local health department and say so right away.
APHIS’s 2026–2027 waterfowl surveillance plan is a reminder to pay attention to exposure, not just a cough or a sore throat. Bird flu remains rare in people, but knowing what to watch for can make a care conversation much simpler.
What are the first signs of bird flu in humans?
As of October 2026, the CDC symptom guide says eye redness and irritation, also called conjunctivitis or pink eye, has been the predominant symptom in recent U.S. H5 cases. Respiratory symptoms and fever have also occurred, and fever may not always be present.
| Symptoms that may be mild | Symptoms that need urgent attention |
|---|---|
| Red or irritated eyes, mild fever or feeling feverish, cough, sore throat, stuffy or runny nose | High fever that stops normal activity, shortness of breath or trouble breathing, confusion, seizures |
| Body aches, headache, fatigue, and sometimes nausea, vomiting, or diarrhea | Severe illness can involve pneumonia, respiratory failure, sepsis, kidney injury, or inflammation of the brain |
These symptoms overlap with many common illnesses. The detail that changes the next step is a recent animal exposure. Use a short symptom timeline to note when symptoms began, what animal contact occurred, and whether your eyes, breathing, or fever changed.
How soon do symptoms start, and how long can bird flu last?
The CDC says respiratory symptoms usually begin about three days after exposure, with a range of about two to seven days. Eye redness or irritation can begin one to two days after exposure. Illness usually lasts from a few days to less than two weeks, although severe illness may last several weeks.
Children can have the same kinds of symptoms listed above. For a child or adult with a possible exposure, the useful call is not “Is this definitely bird flu?” It is: “There was contact with a sick or dead bird or another affected animal, and these symptoms began on this date. What should we do next?”
How does bird flu spread to people?
Bird flu is an influenza A virus that mainly spreads among birds and can infect other animals. The Washington State Department of Health says infected animals can spread virus through saliva, mucus, feces, and—in infected cows—milk. A person can be exposed when virus reaches the eyes, nose, or mouth, including through close contact with infected animals or their environment.
The higher-risk group includes people who work with poultry, waterfowl, dairy cattle, or sick animals. Person-to-person spread is rare; recent U.S. cases have mainly involved known animal exposure. Properly cooked poultry and eggs and pasteurized milk are not the same exposure route as handling sick animals or consuming raw milk or raw dairy products.
How rare and how serious is bird flu in people?
As of October 2026, the U.S. Department of Agriculture’s APHIS overview says avian influenza A viruses rarely infect people. The CDC says most U.S. human cases so far have been mild, while illness has ranged from mild to severe, including death.
That is why a headline can feel alarming while your personal risk remains tied to your actual exposure. A cough without animal exposure may have many possible causes. A cough, red eye, fever, or fatigue after close contact with sick birds, dairy cattle, raw milk, or contaminated animal surroundings is worth reporting promptly to a clinician.
Which birds and animals are most affected?
Wild waterfowl—especially ducks, geese, and gulls—are important carriers of avian influenza viruses, according to Cornell’s wildlife guidance. Some wild birds carry virus without looking ill. Raptors such as hawks, eagles, and owls are more likely to show severe illness.
Domestic chickens, turkeys, ducks, quail, and guinea fowl are highly susceptible and may die quickly after infection, the Washington Department of Health says. The October 2026 APHIS update adds that highly pathogenic strains can wipe out domestic poultry flocks within days.
| Animal | What you may notice | Practical next step |
|---|---|---|
| Wild birds | Eye swelling, breathing or digestive symptoms, tremors, seizures, or sudden death can occur; some waterfowl may appear well. | Keep people and pets away; follow local wildlife reporting guidance. |
| Backyard chickens and other poultry | Respiratory, digestive, or neurologic signs; reduced egg production; rapid deaths may occur. | Contact the appropriate state agriculture or animal-health authority. |
| Cats and dogs | Pets can be infected through contact with infected animals, raw milk, raw dairy, raw meat, or contaminated environments. Cats can become seriously ill. | Keep pets away from sick or dead animals and contact a veterinarian if you are concerned. |
| Pet birds, including budgies | Bird flu signs are not always clear without testing; respiratory, digestive, or neurologic signs can occur in birds. | Separate the bird from potential exposure and contact an avian veterinarian or local animal-health authority. |
What treatment options are there?
For people with suspected or confirmed bird flu, antiviral medicines are the medical treatment route. Cleveland Clinic lists oseltamivir, peramivir, and zanamivir as antivirals a clinician may prescribe when bird flu is identified early. Severe illness may require hospital care for complications.
There is no over-the-counter product, supplement, or everyday remedy in the guidance above that replaces assessment after a possible exposure. Everyday steps are about avoiding exposure: do not handle sick or dead birds or animals, keep pets away from them, and avoid raw milk, raw dairy products, and raw meat. The Washington Department of Health recommends protective equipment for people who must work around sick or dead animals or their environments.
What is known about bird flu in the United States in 2026?
As of October 2026, APHIS describes bird flu as a disease of domestic and wild birds and says surveillance includes commercial flocks, backyard flocks, and wild birds. Migration can change animal monitoring needs because waterfowl gather and move across regions, but surveillance activity is not a forecast that you will become ill.
Bird flu has affected birds and animals in many places, and animal detections do not automatically mean human infections in every state. For a current local question, ask your state or local health department about active guidance in your area rather than relying on a national headline alone.
Before you call or go to a visit
- Write down the date and type of any contact with sick or dead birds, poultry, cattle, raw milk, raw pet food, or an animal environment.
- List symptoms, including eye redness, fever, cough, breathing changes, stomach symptoms, and fatigue, with the day each started.
- Bring your medication list and note any chronic conditions. If your symptoms are urgent, use the care route in urgent symptom contact routes instead of waiting for a routine portal reply.
- If you have trouble breathing, altered consciousness, seizures, or other severe symptoms, seek emergency care.
Your next step is simple: if there was a relevant animal exposure, make the call today and use the script above. A clear timeline helps the care team decide what testing and treatment discussion fits your situation.
By the Primary Care Visit Guide Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
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