Back in 1947, Alexander John Haddow made a discovery that didn't seem particularly important.
He was part of a team doing research on yellow fever in Uganda, and he identified a new virus that was making a monkey in his lab sick.
He named the virus Zika, after the Zika forest where his lab was located.
At first, Haddow believed only monkeys were affected. It turns out humans could catch the virus, too, but in Uganda, there have been only two documented cases (although that may be because the symptoms are often mild or even nonexistent).