It's one thing to make sure the cohabitate cells won't make it off the island, but honestly most of those goons aren't worth saving. They are just backstabbing scumbags incapable of using their brains. They could be used in a single fight against the infected, but only if the fight is strictly a fight or die situation. Otherwise they would be glad to abandon their fellow humans if they alone could escape or if they saw an opportunity to profit by betraying the human side. There are a few decent ones among them, but only a few. I doubt they decent ones are in any particular danger since the cohabitate cells just want to leave the island and aren't interested in human genes anymore.