Why Do People Get Blood Work Done Why Would They Draw Blood In Order To Work In A Hospital? What Are They Testing For? Hiv?

Why would they draw blood in order to work in a hospital? what are they testing for? hiv? - why do people get blood work done

just a question we need to discuss with some people. someone has found a job in a hospital, but to work until he's blood type of work? He did not have HIV, but everyone says that is what they are controlled by another person, but said there was no way to check whether you log on as First something .. only with the hope to solve this debate! 10 points to someone who really knows what they are doing blood tests! Thank you!