I would say find out what was in it first. In reality no matter what was in that frig, it's probably way cleaner than the ones you keep your food in. Medical equipment is usually so clean it's ridiculous. Good scrub with some gloves and some bleach and it would be good as new. I'd prob take it. Even if it had blood samples or anything in it. If one of those samples were to spill or leak, they would have to decontaminate and sanitize the whole thing otherwise risk the destruction of all their samples. That would be bad for business. The biohazard sticker is doing it's job, making people stop to question the contents. And in reality, they don't store virus' in mini fridges.