If you were bitten or scratched, you will need to cover the wound, and get away from your group members and kill your self because they has not been a cure for this.
The first stage of getting bitten, is that you will start to have a fever and then cough
The second stage, is when you cant think straight or at all
The third stage is when you start passing out and then you skin gets real pale
The fourth stage is when you turn into a zombie.
Before you become a zombie, tell your fellow people/friends or family to just leave you behind. There is no way to help you once you are bitten.
At least hold off the zombies until the affects have become major.
Also if you were bitten, its best if you kill your self or if close to water, then swim fall out into the water and then swim underwater until you touch the bottom.