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An airborne disease with an incubation time of 18 years goes unnoticed, but spreads across the world. 18 years later, its "timer" goes off, killing all adults. Good idea (thanks, @Morfium !), but I...
An airborne disease with an incubation time of 18 years goes unnoticed, but spreads across the world. 18 years later, its "timer" goes off, killing all adults. Good idea (thanks, @Morfium !), but I...