I can understand the worry and its good to think about what you are doing. But lets look at a few things. I do not know the collection procedure, this is guessing but I am sure people that donate are first screened for disease. Second its collected from urine which is inherently sterile, third this stuff has been on the market for a long time if people were getting AIDS from it we would know. Fourth the stuff is synthesized and freeze dried which should kill anything that is left, lastly very few diseases can last outside of the body for more than a few minuets to even seconds, AIDS can only last outside of the body for a few mins tops. Also the stuff is stored in a vial an non optimal temps and environment for months maybe even years before you take it. Also you have to look at the delivery method of it, its going to in fat usally not straight to the blood or muscle. I wouldnt worry about it, your more likely to catch something from the guy you had a lunch with.
