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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

    • Malaria Malaria is a disease that is spread by the bite of an infected Anopheles mosquito. Malaria symptoms include fever, chills,...learn more »
      In This Article
      Malaria Article
      • Malaria facts
      • What is malaria?
      • What causes malaria?
      • What are risk factors for malaria? Is it possible to prevent malaria?
      • What are malaria symptoms and signs?
      • How do physicians diagnose malaria?
      • What is the treatment for malaria?
      • What is the prognosis of malaria?
      • Is there a malaria vaccine?
      • Can malaria reoccur after treatment?
    • Respiratory Syncytial Virus Respiratory syncytial virus (RSV) is a highly contagious viral infection. Symptoms include fever and nasal congestion and...learn more »
      In This Article
      Respiratory Syncytial Virus Article
      • Respiratory syncytial virus (RSV) infection facts
      • What is the respiratory syncytial virus (RSV)?
      • When does RSV infection occur, and who gets it?
      • Who is at risk for severe disease?
      • Is RSV infection contagious, and how is RSV infection transmitted?
      • What are the symptoms of RSV infection?
      • How is RSV infection diagnosed?
      • What is the treatment for an RSV infection?
      • How can RSV infection be prevented?
      • Is there an RSV vaccine?
      • What is the prognosis of an RSV infection?
    • Reye's Syndrome Reye's syndrome (RS, or Reye syndrome) is a sudden, sometimes fatal, disease of the brain with degeneration of the liver. Reye...learn more »
      In This Article
      Reye's Syndrome Article
      • Reye's syndrome facts
      • What is Reye's syndrome?
      • What causes Reye's syndrome?
      • What are risk factors for Reye's syndrome?
      • What are Reye's syndrome symptoms and signs?
      • How is Reye's syndrome diagnosed?
      • What is the treatment for Reye's syndrome?
      • What is the prognosis for Reye's syndrome?
      • Can Reye's syndrome be prevented?
      • What research is being done on Reye's syndrome?
      • Where can I find more information about Reye's syndrome?
    • 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 changes in altitude or air travel affect Eustachian tube problems?
      • How is Eustachian tube blockage treated?
      • Eustachian Tube Problems At A Glance
    • Cold Sores (Nongenital Herpes Simplex Infections) Herpes simplex infections are common and when they appear around the mouth and lips, people often refer to them as "cold sores"...learn more »
      In This Article
      Cold Sores (Nongenital Herpes Simplex Infections) Article
      • Herpes simplex infections (nongenital cold sores) facts
      • What are herpes simplex infections?
      • What causes cold sores?
      • What makes herpes (cold sores) recur?
      • How do cold sores spread?
      • What are the signs and symptoms of cold sores?
      • What is primary oral herpes?
      • What does recurrent herpes look like?
      • How long do cold sores last?
      • What are the risk factors for herpes simplex infections?
      • What are the possible complications of oral herpes (cold sores)?
      • What is the prognosis for oral herpes (cold sores)?
      • What other conditions can look like oral herpes (cold sores)?
      • What is angular stomatitis?
      • What are canker sores?
      • How is oral herpes diagnosed?
      • What is the treatment for cold sores, are there any home remedies, and what medications are used?
      • Is it possible to prevent cold sores?
    • Cold, Flu, Allergy Treatments Before treating a cold, the flu, or allergies with over-the-counter (OTC) medications, it's important to know what's causing the...learn more »
      In This Article
      Cold, Flu, Allergy Treatments Article
      • Facts about cold, flu, and allergy treatments
      • Introduction to cold, flu, and allergy treatments
      • What are the differences between allergy, cold, and flu symptoms?
      • What are the different types of medications for headaches, body aches, fever, and flu-like symptoms?
      • Nasal congestion, sneezing, and runny nose
      • Cough
      • Sore throat and other symptoms
      • What about vitamin C and zinc?
      • What are some important considerations for the safe use of OTC products?

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Terms related to Influenza:

  • Flu