Mike01, it can be done easily. Yet, I don't think it is good for gameplay. As the zombie will win easily as they have infection bomb.
Lets make a comparison: 4 zombie vs 4 human.
All 4 zombie have infection bomb which when they throw it to human, the human will become a zombie whereas the human only have a fire grenade. It will take at least 6 until 10 or more throwing of fire grenade to zombie to kill it as the zombie have more health.