Ian Haydon, a 29-year-old living in the Seattle area, joined CNN's global town hall to explain what motivated him to participate in a vaccine trial for the virus.
Haydon said he was one of 45 healthy people selected to participate in the phase 1 trial after thousands volunteered.
He said he was just trying to do his part to stop the virus' spread.
"My motivation for wanting to participate in this trial is pretty simple: this is one way that I can help out, and I'm very fortunate to be in good health. If stepping up can speed up a vaccine, that seems like the right thing to do," he said.
"The weight of the world is on these vaccines right now. No one knows if this is going to be the one. But I think the people involved in the study clearly know they’re involved with something historical here."