Influenza

Definition

Influenza, commonly known as the flu, is a contagious respiratory illness caused by influenza viruses. It can lead to mild to severe illness and even death in extreme cases.

5 Must Know Facts For Your Next Test

1. Influenza viruses are categorized into three main types: A, B, and C, with Type A being the most common cause of epidemics.
2. The virus primarily spreads through respiratory droplets when an infected person coughs or sneezes.
3. Symptoms include fever, chills, cough, sore throat, muscle aches, fatigue, and headache.
4. Annual vaccination is the most effective way to prevent influenza infection and its complications.
5. Antiviral medications can be used to treat influenza but are most effective when taken within the first 48 hours of symptom onset.

Review Questions

• What are the primary types of influenza viruses?
• How is influenza transmitted from person to person?
• What are common symptoms associated with influenza?

Related terms

Vaccine: A biological preparation that provides active acquired immunity to a particular infectious disease.

Epidemic:

A widespread occurrence of an infectious disease in a community at a particular time.

Antiviral Medication: Drugs that inhibit the development or replication of viruses.