Excellent article, Rich.
What I get from it.... :
The good : some few people receive the virus and their immune system does a great job and they recover, never having had symptoms. EBV, CMV, and HSV can present similarly. And I have heard anecdotal accounts of HIV occurrences like this. (These EBV, CMV, HSV, and HIV individuals would remain asymptomatic carriers...for the remainder of their lives.)
The bad : the above few people are still for a period of time sources of spreading the Ebola virus infection, indeed, and frighteningly, perhaps with neither themselves nor others knowing it (unless the 'asymptomatics', for whatever reason, happen to be tested for Ebola). Male semen I would suppose still sheds live virus for the 2-3 month period mentioned in most accounts of Ebola infection.
Also bad--because these men may not know they have had (and unknowingly overcome) Ebola virus, and are shedding it in their semen for the stated 2-3 months.
These individuals will in due course become no longer infectious, regarding Ebola virus.
Surely they are testing workers who work intimately with Ebola patients...who never appear to develop symptoms. It would be wise, imho.
This reminds me of other diseases that some individuals are able to almost miraculously live through, (some of whom remain asymptomatic carriers...like Typhoid Mary).