Mistaken Identity

A guy goes into a drug store looking for some disinfectant. He walks up to an employee in a white uniform and asks her "Excuse me, do you sell any products here that will kill the Corona Virus?" She says, "ammonia cleaner". . . He replies, "Oh sorry to bother you, I thought you were a pharmacist. (for people with no clue: Amonia = I'm only a)