What is something that people think is dangerous but in reality is completely harmless?

https://lemmy.fmhy.ml/post/698460

What is something that people think is dangerous but in reality is completely harmless? - FMHY

For my country (Germany): Catching a draft. Basically people believe that a light breeze from an open window will make you ill.
I’ve heard that cited in stories, usually older. A baby dies and they blame someone leaving the door open too long and letting in a draft.