Numerous people.... Diabetics who are experiencing nerve degeneration of the extremities (something called Diabetic Neuropathy). Another group would be the elderly, who do loose sensation as age progresses. And lastly those with some sort of paralysis or peripheral nerve damage.
C. loud noise or music because infection and injury do not occur often and aging wouldn't make any sense.
Answer:
A drug allergy is the abnormal reaction of your immune system to a medication
Explanation:
