There are four identified subtypes of Ebola virus. Three of the four have caused disease in humans: Ebola-Zaire, Ebola-Sudan, and Ebola-Ivory Coast. The fourth, Ebola-Reston, has caused disease in non-human primates, but not in humans.

Can we draw the following conclusion?
Ebola can be deadly

Choices: - Yes; - It's impossible to say; - No;
It's impossible to say