Blacken Egg on Day You Have an Accident
Universiteitsmuseum Amsterdam has a very educational selection of vintage public health posters - the dangers of clothes:
of lack of self-control:
something about electrical monsters:
and a 'smeer of poets', sounds both dangerous and disgusting:
The worst ones are the British anti-syphilis ones, not reproduced here - I can't look at a picture of a nun holding a sad baby so don't ask me.