@sanjay_world @DrEricDing Africa has a median age of 18. Considering how impact of this disease goes up dramatically with age, you could infect the whole continent and barely notice (slight exaggeration, but not much).
@sanjay_world @DrEricDing 非洲的平均年龄为 18 岁。考虑到这种疾病的影响如何随着年龄的增长而急剧上升，你可能会感染整个大陆而几乎没有注意到（有点夸张，但不多）。