There are more than 200 different cold viruses. You can build up protection against a cold virus that you have already had. How ever, this 'immunity' can not help a person fight off a different cold virus.
Immunity means:
A. the spread of a disease
B. the body's ability to fight of disease
C. a way to keep sick people away
D. an anti cold medicine
I think it's B
1 answer
Right.