Later the workforce included 2,000 Red Army POWs, who had to survive extreme conditions, including sleeping out in the open. By mid-November, only 500 of them were still alive, of whom at least 30% were incapable of further labor. In mid-December, barracks for 20,000 were ready when a typhus epidemic broke out, and by January 1942 all the slave laborers – POWs as well as Polish Jews – were dead.