I know we are nowhere near the triangle just yet, but I just thought I would share that when DS2 got the pox we weren't even looking for it. We still have no idea where he might have gotten it! We had a theory that maybe it was from a music together class he was in, but nobody there had had the virus. Maybe the library? We are always there and the windows are always shut. We were so shocked because we expected the big brother to come home with it! So I guess what I am saying is that if there is an outbreak somewhere- your little guys might just pick it up from anywhere. Maybe try the little playspaces in the museums. There are always kids crawling and spreading germs all over there and there are never any windows.
I'll be sending you some chicken pox wishes in the meantime! Good luck!