Diseases from makeup artists...?

Next weekend, there's going to be like an indie horror movie filming and they're casting extras. It's a zombie part and I was thinking about doing it but the only thing is that I'm a big hypochondriac and afraid of catching diseases. The director (Who also directed "Deadlands: The Rising") said that I could bring my own makeup. Now, my question is, do you think when the makeup artists put your makeup on and stuff, do you think it's possible to catch a deadly or infectious disease (Like Hiv/aids, skin infections, etc...) if they get their hands near your eyes or mouth, or if they have an open sore/cut or if you have an open sore/cut and they touch or something? Would it be rude to ask them to wear rubber gloves? Knowing me, I seriously would ask if they could wear gloves, lol.

Thank you!

I don't want to sound rude, but if you are that afraid of germs, why are you going? It is always a good idea to take your own makeup because it could be infected with staph or strep germs. Bring disposable make up sponges and perhaps some cotton swabs or cotton ball. Gloves and hand sanitizer should also be added to the list.
I would take buffered or slow release vitamin c, zinc, and lysine for added protection against viruses and bacteria.

Happy filming!!