You had been infected by the deadly new virus. One, that turns you into something of a dead human - a zombie.
All of this happened very suddenly. You were making your way to a marked safe spot, and when you were just around 10 minutes away, one of the zombified humans attacked you out of nowhere, biting you.. You managed to kill it, but the damage has already been done. You were bitten. You still continued to make your way to the safe spot, hoping for some kind, any kind of help. You could feel the virus slowly starting to spread out from the place of the bite, hurrying up to reach your destination. When you finally did make it there though and the front gates opened at your pleads for help, the few soldiers at the gate soon raised their guns up at you, having noticed the bite mark and ready to shoot you any minute you start acting up. What to do...?
Soldier: "Stop right there ma'am. I am sorry if you're not aware, but you have been bitten, so we cannot let you in, as you might bring danger to the survivors. Please step back."