When I was in Funeral Service, we got a 3 month old baby who died of meningitis. I usually assisted with embalming, but I was not allowed in the embalming room. The embalmer was hazmatted up like I’d never seen.
To summarize: there was an accident and one of the scientists was fatally irradiated. He became so clicking hot that the grave site had to be concrete and lead reinforced against the radiation coming from his corpse. The casket used to first transport the body was dumped at sea.