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www.travelhealth.gov.hk/english/downloads/files/influenza_txt.pdf

Causative agent . Influenza. is a highly infectious viral disease. It is caused by various types of influenza viral strains. Three types of influenza viruses are recognized: A, B and C. Type A is more common. In Hong Kong, the two subtypes of influenza A, H1N1 and H3N2, are most commonly seen, Emergence of new subtypes occurs from time to time at

www.answers.com/Q/What_is_the_causative_organism_of_seasonal_influenza

Influenza is the name of the infectious disease that certain viruses cause in people and other animals. The virus that causes the flu is the organism, and influenza is the disease the organism causes.

en.wikipedia.org/wiki/Influenza

Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus. Symptoms can be mild to severe. The most common symptoms include: high fever, runny nose, sore throat, muscle pains, headache, coughing, sneezing, and feeling tired. These symptoms typically begin two days after exposure to the virus and most last less than a week.

www.historyofvaccines.org/content/articles/influenza

Symptoms and Causative Agent. Influenza is a respiratory illness caused by influenza viruses. There are two main types of influenza viruses (A and B) but many different strains of each type. The diseases caused by these viruses are often collectively referred to simply as “the flu.”

www2.health.vic.gov.au/.../disease-information-advice/influenza

Influenza virus (types A, B and rarely C) is the causative agent. Identification of influenza Clinical features Influenza is an acute respiratory disease. Symptoms include fever, headache, myalgia, lethargy, coryza, sore throat and cough.

www.webmd.com/cold-and-flu/what-causes-flu-viruses

Want to avoid getting the flu? A good start is to know what causes it. This illness is different from a cold. While more than 100 different viruses can cause a cold, only influenza virus types A ...

www.mayoclinic.org/diseases-conditions/flu/symptoms-causes/syc-20351719

Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting. For most people, influenza resolves on its own. But sometimes, influenza and its complications can be deadly.

medbroadcast.com/condition/getcondition/influenza

Causes. Influenza is contagious, which means it can be spread easily from person to person. Viruses that cause influenza spread from person to person mainly by droplets of respiratory fluids sent through the air when someone infected with the virus coughs or sneezes. Other people inhale the airborne virus and can become infected.

www.cdc.gov/hi-disease/about/causes-transmission.html

Causes. Haemophilus influenzae disease refers to any infection caused by H. influenzae bacteria. There are six identifiable types of H. influenzae (named a through f) and other non-identifiable types (called nontypeable). The one that people are most familiar with is H. influenzae type b or Hib.. These bacteria live in people’s nose and throat, and usually cause no harm.

www.healthline.com/health/flu-causes

Influenza, or the flu, is a viral infection that attacks the lungs, nose, and throat. It’s a contagious respiratory illness with symptoms ranging from mild to severe. The flu and the common cold ...