Tang Ye asked in confusion, and the soldier quickly replied, "Last winter, the incineration plant in the United District was piled with bodies. Many people died that winter; many were frozen to death. When the heavy snow melted, frozen corpses were everywhere."
After the soldier finished speaking, the soldiers around Tang Ye exchanged glances with their closest comrades, not because they found the number of deaths unbelievable, but because there was another layer of meaning in the soldier's words. In the post-apocalyptic air, a small amount of anti-life substances drifted around, in such minute quantities that most survivors, both new and old humans, had absorbed some without turning into zombies. The immune system would likely expel them upon entry.