The best chance you have here is to rely on your stockpiled food and water. (I need to stockpile more food) Don't go out unless absolutely necessary and if you do, wear your mask that you cleverly stashed away. In this case, I think it would be reasonable to have preparations to defend one's home.

In this case, bugging out of the city is a bad idea if you plan to go to family/friends. What if you've got whatever the disease is and symptoms just haven't presented yet? Don't want to be spreading that nasty all over.