Aqua Tofana: The 17th Century Husband Killer

I wouldn’t present it as a fact. Note that even the article is uncertain how much of that was urban legend or moral panic - perhaps fueled by comments like the parent comment.

> “This elaboration of claims resulted in belief in a poison that was very widely feared, but never actually existed,” Dash wrote. He further suggests that many deaths attributed to Aqua Tofana were likely due to natural causes and that its notorious reputation was largely the result of a moral panic.