Question

what effect could the flu vaccine nose spray have on people? a it could help scientists guess the most dangerous type of flu. b it could protect people against different flu viruses. c it could help certain animals get the flu less often. d it could allow people to get more than one vaccine a year.

Explanation:

The purpose of a flu - vaccine, including the nose - spray version, is to provide protection against different flu viruses. It doesn't help in guessing the most dangerous flu type, is for humans not animals in this context, and isn't related to allowing multiple vaccines a year.

Answer:

B. It could protect people against different flu viruses.