Answer:
Well I do not think it would be A or B. The best answer I can give you is D. If you talk to someone face to face it makes the message more clear and the person will be able to understand better, plus it's another good way to give a message rather then mailing or something like that. If the answer is not D however then it would be C.
Explanation:
If this was helpful please mark brainliest I am one away from next rank :D
B) So patients can heal properly
<em>Vaccines work by simulating an illness to help establish immunity. However, while this sort of infection nearly never produces sickness, it does trigger the immune system to create T-lymphocytes and antibodies. The imitation illness can sometimes induce modest symptoms, like as fever, after receiving a vaccination.</em>
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<em>- RobertOnBrainly</em>
