Hey, thanks man! That’s a really big help.

Yes, it’s rare but apparently so. This is news to me, but it makes a lot of sense. This paper has asymptomatic Ebola at 2-6% of individuals that have had contact with Ebola patients.

The important question is whether it is contagious when asymptomatic (or even before symptoms are shown). The WHO are still saying it is not, that said it is thought to be present in semen for around three months after recovery although I don’t think there have been any cases of transmission through such means (i.e. sexually transmitted after recovery)