How can i prevent being affected by a disease outbreak?

Multiple ways: The first way to avoid exposure is to not be there. After that if you are very healthy and no medical issues you can fend off disease better. Good hygiene is another important way to stay disease free.

I assume you mean in: I assume you mean infection disease outbreak. It is not entirely preventable but good hygiene, hand washing, flu and other vaccines, insect repellant are part of the strategy. If you have individual health probelms you need to discuss these wiht your physician