Question

: one reason it has been difficult to develop an effective vaccine for the aids is because . . . choose one: a. hiv has a high mutation rate. b. we do not know the causative agent of aids. c. vaccines can only be developed for bacterial diseases. d. hiv has a dna genome similar to our own.

Answer 1

A) HIV has a high mutation rate

Step-by-step explanation:

It's hard for them to make a vaccine that is guaranteed to get all the strains and mutations.