Influenza (flu) - Symptoms and causes - Mayo Clinic Flu, also called influenza, is an infection of the nose, throat and lungs, which are part of the respiratory system The flu is caused by a virus Influenza viruses are different from the "stomach flu" viruses that cause diarrhea and vomiting Most people with the flu get better on their own But sometimes, influenza and its complications can be deadly Seasonal flu vaccines help prevent flu
Flu symptoms: Should I see my doctor? - Mayo Clinic The flu also can lead to inflammation of the heart, brain or muscles And flu infection can worsen chronic health problems such as asthma and congestive heart failure
Influenza (seasonal) - World Health Organization (WHO) Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world It is characterized by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose The cough can be severe and can last two or more weeks Most people recover from fever and other symptoms
Self-care for the flu - Mayo Clinic Children and teens recovering from flu-like symptoms should never take aspirin because of the risk of Reye's syndrome, a rare but potentially fatal condition Stay home until you feel better and are fever-free for a full 24 hours without taking medicine for fever during that time
Influenza - World Health Organization (WHO) Symptoms Influenza is characterized by a sudden onset of high fever, cough, headache, muscle and joint pain, malaise, and a runny nose lasting 2 to 7 days Influenza is usually mild and uncomplicated and most people recover without medical treatment
Influenza (seasonal) - World Health Organization (WHO) Seasonal influenza is an acute respiratory infection caused by influenza viruses which circulate in all parts of the world It is characterized by a sudden onset of fever, cough (usually dry), headache, muscle and joint pain, severe malaise (feeling unwell), sore throat and a runny nose The cough can be severe and can last two or more weeks
Bird flu (avian influenza) - Symptoms and causes Bird flu, also called avian influenza, is caused by influenza type A virus infections in bird species Depending on the strain, bird flu may cause the bird to have no symptoms, mild illness, serious illness or lead to the death of the bird Bird flu rarely infects humans But health officials worry
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