Dimethylmercury was spilled at MIT on August 26. It seems one person was exposed and taken to MGH Wednesday night. Dimethylmercury is incredibly toxic (https://en.wikipedia.org/wiki/Karen_Wetterhahn). I don't know of any confirmed cases of someone exposed surviving, but I hope they are able to treat this person. There doesn't seem to have been any emergency declared or alert by MIT at the time. Students were informed of potential contamination the following morning, but more recent information suggests the spill was fairly localized. Dimethylmercury is not allowed on MIT's campus so it is unclear why this person had it. The building is closed for decontamination.