Symptoms of bird flu (H5N1)Bird flu in humans can cause a variety of symptoms, which often begin similarly to typical flu. Symptoms usually appear 2 to 8 days after exposure to the virus. These include:Fever: This is the most common symptom of avian flu. The fever is usually high and comes on suddenly.Sore throat, cough and runny nose: Upper respiratory tract infections are common and can be quite serious.Muscle pain (myalgia): Muscle and joint pain is typical, especially in the back, arms and legs.Fatigue and weakness: Patients may experience a general feeling of fatigue and weakness.Respiratory disorders: Some individuals may experience difficulty breathing, which may be due to pneumonia.Gastrointestinal disorders: In some cases, avian influenza can causegastrointestinal symptoms such as diarrhea, vomiting, abdominal pain.In some cases, H5N1 infection can lead to serious complications such as respiratory failure, encephalitis and death.Remember that these symptoms are general and can occur in many other diseases. If you suspect that you may have been exposed to H5N1 infection and have any of the above symptoms, it is essential to contactyour doctor as soon as possible.