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Common bird flu symptoms include: Fever. Problems breathing. Pink eye, also called conjunctivitis. Upset stomach and vomiting. Loose stool, called diarrhea. Bird flu may cause breathing problems more often than other kinds of flu. And during bird flu pandemics, the risk that a person with flu will need a machine to help them breathe is higher.
Symptoms of bird flu include: Fever. Fatigue. Cough. Muscle aches. Sore throat. Nausea and vomiting. Diarrhea. Stuffy or runny nose. Shortness of breath (dyspnea). Pink eye (conjunctivitis). What causes bird flu? A type of influenza A virus, often H5N1 in humans, causes bird flu.
Signs and symptoms may include: shortness of breath or difficulty breathing. Less common signs and symptoms include diarrhea, nausea, vomiting, or seizures. *Fever may not always be present. This graphic shows how bird flu viruses can spread between infected birds and people.
Illnesses in humans from bird flu virus infections have ranged in severity from no symptoms or mild illness (e.g., eye infection, upper respiratory symptoms) to severe disease (e.g., pneumonia) that resulted in death.
Bird flu in humans. Bird flu symptoms in people can vary. The illness often comes on quickly and may start out with flu-like symptoms that include: High fever; Shivers; Aching muscles;...
Signs and symptoms of bird flu may begin within two to seven days of infection, depending on the type. In most cases, they resemble those of conventional influenza, including: Some people also experience nausea, vomiting or diarrhea. And in a few cases, a mild eye infection (conjunctivitis) is the only indication of the disease.
In humans, the symptoms of bird flu are the same as seasonal influenza. Some cases are mild, while others are severe. Avian flu has a much higher mortality rate than seasonal influenza. Roughly 53% of people diagnosed with H5N1 and 50% of people diagnosed with H7N9 have died.