Indeed, a recent publication explains how the disease could be spread from the animal kingdom to humans: fruit bats can carry the disease without displaying any signs of it, and are able to migrate and transfer it to other animals, such as monkeys and rodents. 
Kwa hakika, chapisho la hivi karibuni linaeleza namna gani ugonjwa unaweza kuenea kutoka kwa wanyama kwenda kwa binadamu: popo walao matunda wanaweza kubeba virusi hivyo bila wao kuonesha dalili za maradhi hayo, na wanaweza kuhama na kueneza virusi hivyo kwenda kwa wanyama wengine, kama vile nyani na pimbi.