for the 4 blocks that have 1 person infected, it is probably a family of at least 4. So it will soon expand....
what is the reason for not locking down those buildings ? Remember before they evacuated the whole of carribean coast ... or they evacuate a whole building just because one person had it and it was in the sewage ??
What super power sewage construction does this estate have that makes it super safe and no chimney effect ???