You are now a zombie, this means that you should kill the living, and not harm your fellow zombie brethren.
If you are an infectious zombie: Kill and infect people with your "Zombify" ability. It will add more friends to your hoard of undead!
1. Simply attacking humans, normally will infect them if you land enough hits in a short enough time. Using the ability on the living infects them immediately, but it still takes a while for the infection to completely turn them into a zombie.
2. Scratching/biting/"Zombifying" a dead human will instantly convert them to a new friend!
You may be a mutated zombie and have unique powers! Check your DNA powers bar to see if you have any active genes!
For more information, consult the wiki