The Recurrence of Influenza Epidemics Is Due to

question 12

Multiple Choice

The recurrence of influenza epidemics is due to

• A) Lack of antiviral drugs.
• B) Lack of naturally acquired active immunity.
• C) Antigenic shift.
• D) The Guillain- Barré syndrome.
• E) All of the above.

---

Definitions:

Punctuation

The use of symbols in writing that separate sentences and their elements, clarifying meaning.

Apostrophe

A punctuation mark used to indicate possession or the omission of letters.

Possessive Noun

A noun that shows ownership or association with something else, typically formed by adding an apostrophe and the letter 's' to the word.

Numbers

Numerical values used to represent quantities or amounts.