Quite: see for example https://www.newscientist.com/article/mg12817450-800-the-mercury-the-physicists-left-behind/ https://www.newscientist.com/article/mg128174

Quite: see for example https://www.newscientist.com/article/mg12817450-800-the-mercury-the-physicists-left-behind/ https://www.newscientist.com/article/mg12817450-800-the-merc... for an example of the effects of mercury contamination in a building used for Physics research in Cambridge UK