Why should the recruitment of nurses be negative for penicillin?

Prevent nurses from being allergic to penicillin, leading to abnormality or even death! Nurses have to give injections and infusions to patients, which will inevitably lead to the risk of stabbing themselves and contacting drugs. If the nurse is allergic to penicillin, if she is stabbed by penicillin injection or infusion, it may lead to allergic death! Therefore, nurses must be negative for penicillin and not allergic.