And I kept asking myself this really simple question: if the ancestors to New World monkeys could somehow cross the Atlantic Ocean, why couldn't humans cross that tiny stretch of water?

如果祖先新世界猴可以跨越大西洋，为何人类不能跨越这小小的狭水域？

For example, the yellow fever virus is carried by African wild monkeys, whence it can always infect rural human populations of Africa, whence it was carried by the transatlantic slave trade to infect New World monkeys and people.

例如，黄热病病毒是由洲野猴携带的，因此它总是可以洲农村人口，而跨大西洋奴隶贸易则携带黄热病病毒新大陆的猴子和人类。