It is a practice-related complaint. It's usually caused by nurses or doctors not taking precautionary measures and making sure that their hands are cleaned and that they wear masks when operating on someone or assisting in an operation. It could also be unclean untensils that are used for surgery too!
A. Inconsistently collected data
I believe I did this one before and I believe I put A and got it right
A health care system in ancient Egypt was alot more loose, there were not many restrictions but it was not availible to everyone during that time
