[palmer]

Can someone explain why the family members who were in closed quarters with the infected lying gentleman have not shown any symptoms while this health care worker has?

Earlier stage of the disease has less virus. If nobody touched his saliva, if he washed his hands after the bathroom, if they disinfected enough (Jallah did that) then they got lucky. OTOH, the nurses have to clean fluids off the patient, empty the bed pan, etc. Pretty soon your protective garb is covered and you are at risk no matter how carefully you take it off. In the research facilities they 1/2 hour of showering and decontamination and it is doubtful they did that in this hospital.

[Chgogal]

If nobody touched his saliva, if he washed his hands after the bathroom, if they disinfected enough (Jallah did that) then they got lucky.

The family members lived for days in a contaminated environment. They'd have to be damn lucky. Unbelievably lucky.

Hope your hypothesis is correct.