[yakshemash]

Transmission of Ebola occurs only after patient develops the symptoms of the disease anywhere between 2 days and 3 weeks after infection [1]. By then most patients are not in a condition to be "walking around".

[1] https://en.wikipedia.org/wiki/Ebola_virus_disease

[czechdeveloper]

Ok. I was later thinking that this might be the case. Thank you for finding it.