Influenza B virus

Definition

Influenza B virus is one of the primary types of viruses responsible for causing seasonal flu in humans. Unlike Influenza A, it primarily affects humans and is less likely to cause pandemics.

5 Must Know Facts For Your Next Test

1. It has two main lineages: B/Victoria and B/Yamagata.
2. Influenza B virus mutates more slowly compared to Influenza A virus.
3. Symptoms typically include fever, cough, sore throat, body aches, and fatigue.
4. It can lead to severe respiratory infections especially in children and the elderly.
5. The annual flu vaccine usually includes strains of Influenza B.

Review Questions

• What are the two main lineages of the Influenza B virus?
• Why is Influenza B less likely to cause pandemics compared to Influenza A?
• What are common symptoms associated with an Influenza B infection?

Related terms

Influenza A Virus: A highly variable influenza virus that can infect multiple species and has a high potential for causing pandemics.

Hemagglutinin: A glycoprotein found on the surface of influenza viruses that allows them to bind to host cells.

Neuraminidase Inhibitors: A class of antiviral drugs used to treat flu by blocking the function of neuraminidase, an enzyme essential for viral replication.