Question

What are the types of influenza mentioned in the given content?

1) Influenza A (seasonal)
2) Influenza B
3) Avian flu (H5N1)

Answer 1

The types of influenza mentioned are Influenza A (seasonal), Influenza B, and Avian flu (H5N1). New influenza vaccines must be developed each year due to the virus's ability to rapidly mutate.

Step-by-step explanation:

The types of influenza mentioned in the given content are:

• Influenza A (seasonal): This is the most virulent group of influenza viruses and causes seasonal pandemics.
• Influenza B: This virus is less virulent and is sometimes associated with epidemic outbreaks.
• Avian flu (H5N1): This refers to a deadly strain of avian flu virus that poses a risk for a new influenza pandemic.

New influenza vaccines must be developed each year due to the ability of the influenza virus to rapidly mutate through antigenic drift and antigenic shift.