So he lied. Just like our government is on how they are “protecting us”. Damn them all.
Ebola in its second phase affects the brain and causes irrational behavior. The fact that this man - who had clearly got it while he was caring for his sister, who died of it - wanted to go back to his daughters’ birthday party even though he was already showing symptoms before he even got on the plane demonstrates this.
People who survive Ebola are left with problems because of its massive effect on the brain. Many of them have visual problems (they probably have other problems too, but most of the reports come from African hospitals that may only catch the obvious things) and also even permanent physical problems, such as major joint problems.