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Featured: Flu (Influenza) Main Article

Influenza (flu) is a respiratory illness caused by a virus. Flu symptoms include fever, cough, sore throat, runny nose, headache, fatigue, and muscle aches. The flu may be prevented with an annual influenza vaccination.

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    Related Diseases & Conditions

    • Upper Respiratory Tract Infection An upper respiratory infection is a contagious infection of the structures of the upper respiratory tract, which includes the...learn more »
      In This Article
      Upper Respiratory Tract Infection Article
      • Upper respiratory infection facts
      • What is an upper respiratory infection?
      • Is an upper respiratory infection contagious?
      • What are the causes of upper respiratory infection?
      • What are the risk factors for upper respiratory infection?
      • What are the symptoms of upper respiratory infection?
      • When should you seek medical care for upper respiratory infection?
      • How is an upper respiratory infection diagnosed?
      • What is the treatment for upper respiratory infection?
      • What are some of the home remedies for upper respiratory infection?
      • What are some data on alternative therapies in treating upper respiratory infections?
      • What are the complications of an upper respiratory infection?
      • Can an upper respiratory infection be prevented?
      • What is the outlook for a patient suffering from an upper respiratory infection?
    • Headache Headaches can be divided into two categories: primary headaches and secondary headaches. Migraine headaches, tension headaches,...learn more »
      In This Article
      Headache Article
      • Headache facts
      • What is a headache?
      • How are headaches classified?
      • What are primary headaches?
      • What are secondary headaches?
      • What are cranial neuralgias, facial pain, and other headaches?
      • What causes tension headaches?
      • What are the symptoms of tension headaches?
      • How are tension headaches diagnosed?
      • How are tension headaches treated?
      • What causes cluster headaches?
      • What are the symptoms of cluster headaches?
      • How are cluster headaches diagnosed?
      • How are cluster headaches treated?
      • Can cluster headaches be prevented?
      • What diseases cause secondary headaches?
      • How are secondary headaches diagnosed?
      • What are the exams and tests for secondary headaches?
      • When should I seek medical care for a headache?
    • Eustachian Tube Problems (Problems Clearing Your Ears) The Eustachian tube is a membrane lined tube that connects the middle ear space to the back of the nose. Problems include partial...learn more »
      In This Article
      Eustachian Tube Problems (Problems Clearing Your Ears) Article
      • What is the Eustachian tube?
      • What are the functions of the Eustachian tube
      • What can cause Eustachian tube blockage?
      • How do altitude changes or air travel affect Eustachian tube problems?
      • How is Eustachian tube blockage treated?
      • Eustachian Tube Problems At A Glance
    • Fatigue Fatigue can be described in various ways. Sometimes fatigue is described as feeling a lack of energy and motivation (both mental...learn more »
      In This Article
      Fatigue Article
      • Fatigue Facts
      • Fatigue introduction
      • What causes fatigue?
      • What are the signs and symptoms of fatigue?
      • How is the cause of fatigue diagnosed?
      • What is the treatment for fatigue?
      • Can fatigue be prevented?
    • Bronchitis (Acute) Bronchitis is inflammation of the airways in the lung. Acute bronchitis is is short in duration (10 to 20 days) in comparison...learn more »
      In This Article
      Bronchitis (Acute) Article
      • Acute bronchitis definition
      • What are the causes of acute bronchitis?
      • What are the symptoms of acute bronchitis?
      • What are the risk factors for acute bronchitis?
      • Is acute bronchitis contagious?
      • How is acute bronchitis diagnosed?
      • What treatments are there for acute bronchitis?
      • Acute bronchitis home remedies
      • Acute bronchitis medications
      • When should I contact my doctor about acute bronchitis?
      • What are the possible complications of acute bronchitis?
    • Chronic Bronchitis Chronic bronchitis is a cough that occurs daily with production of sputum that lasts for at least three months, two years in a...learn more »
      In This Article
      Chronic Bronchitis Article
      • Bronchitis facts
      • What is bronchitis?
      • What is acute bronchitis?
      • What are the symptoms of acute bronchitis?
      • What is chronic bronchitis?
      • What are the causes of chronic bronchitis?
      • What are the risk factors for chronic bronchitis?
      • What are the symptoms of chronic bronchitis?
      • When should an individual seek medical care for chronic bronchitis?
      • How is chronic bronchitis diagnosed?
      • What is the treatment for chronic bronchitis?
      • What are the complications of chronic bronchitis?
      • Can chronic bronchitis be prevented?
      • What is the outlook (prognosis) for chronic bronchitis?

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  • Flu

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