STOP them from bringing that baby there and it has been questioned in past study whether it could directly related to SIDS! Have them contact the Red Cross as Chutz said or even call FEMA like I said. Better to be safe then risk the baby by any means.
If you can prove they meaning the landlord knew and were trying to pass a cover-up then they have to legally back with money your moving expenses as well as can be help liable for your health costs associated with the mold and the best way to find this out? Run down the previous tenants that lived there as they would know whether it was growing there when they lived there and that they may have even gone so far as telling the landord in my case that is exactly why they moved and he was cited and told to clean it up and even gave them the bill that he paid someone to do it all which was faked by a relative of his. If they knew it was there and painted over it without having anyone investigate what kinds of mold it was they can be held responsible and should be. It is very expensive to get rid of and some cases far more to treat then to demolish and rebuild depending on whether it is in the walls or not.
First and foremost try to talk to your neighbors about the baby and even alert the health department about the baby being brought home soon.
PAlady it was in a study I read a few years back along with the pesticide most of the exterminators use that has no smell? They came out with about 12 or 15 years ago and therefore alot of folks living in apartment communities didnt know when the management had had the exterminator there while they were away during the day and how there was a high incident of babies under the age of 6 weeks that had died of SIDS in apartment living and they were trying to find a common denominator and this was the only one they could find. They then required the management or the exterminator to notify the tenents before spraying so they could make arrangements if they had a child under that age limit as well as birds and such to go elsewhere for 12 hours and to air out before staying there.
They could never prove what actually was in it and if anything was causing it but it was too close for comfort and the numbers were far to high to ignore I would think. I know I wouldnt risk it but you would be surprised how many folks did and do. My Brother worked for a local exterminator for awhile during his college years and they always asked folks with newborns to leave the premises and stay away for a bit and he said you would be stunned by those who didnt adhere to the request.
The same article also said the numbers of households bearing some types of molds had higher then norm incidents of sids as well but again they couldnt make a direct link as these post mortems in those babies never show anything out of the norm in lab ranges.
Anyway I would want someone to alert me for sure as it wouldnt be worth the risk in any way.
Hoping they get it cleaned up and make the landlord own up to his responsibility in it if he did cover it up. I cant imagine someone painting over it without even cleaning it up first but hey its all about a dollar to some of them.