The Red Zombies appear when the outbreak counter goes to 0. After the 10 second mark to the outbreak, people who will turn into red zombies will be red and move very slowly. Try to get away as far from these people as possible before the outbreak, even if it means going out of your room. Players with the pill can also turn into the red zombies if there are many players with the pill equipped. If you see yourself or others refresh at 37 seconds, then run far away. The 40,12.Outbreak begun 10 sec left do not mean the same thing.