Yan Fei immediately understood that this outbreak of infectious disease was not a natural epidemic, but someone poisoning. Although the person poisoning seemed to be those African individuals running around the world, the mastermind behind them should be the Ancestral Land in the Ape Tribe Base. The Ancestral Land must have conducted experiments on these Africans, using them as virus carriers to poison the world. Because these Africans were not yet 60 years old, they wouldn't get sick, allowing them to execute this poisoning plan perfectly.
Everyone thought the Ancestral Land feared the nuclear weapons of the Western countries and dared not confront them directly, but they underestimated it. Ancestral Land didn't retreat but launched a desperate counterattack. The counterattack of the Ancestral Land seemed insignificant, but the lethality was enormous, easily creating chaos in all of human society and forcing the retreat of the Western Allied Forces.