I think it is quite possible that Duncan’s “relatives” knew or suspected he had Ebola, and quarantined him in the apartment before his symptoms became more apparent. One of them was a healthcare worker, and she was the one that warned the paramedics. I am thinking she was taking precautions, isolating him and probably using lots of bleach. Also, his viral load was probably lower when he first arrived, so he might not have been as contagious.
These are merely speculations, and I could be wrong.
We are all just speculating at this point, but the information here makes more sense than what comes from the idiots at the CDC.
Thank you.