Strain B started with a genetic mutation in patient zero that caused them to turn into a zombie. This strain differs from A in that all zombies can infect new people. Zombies infected with strain B can infect 1 person every minute

|Minutes| 0 | 1| 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Number of zombies| 1 | | | | | | | | | | |

Number of zombies| 1 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |