[pasc1878]

Look at 19th Century deaths in places like coal mines, deaths due to poisonous medicines, asbestos, lack of sewage.

Public health has had more effect than anyother medical change.

[afh1]

Constructing sewage, the evolving history of work, and regulating hearing aids have very little in common, and apart from the last very little to do with regulators.

[pasc1878]

Yes they do look at some history.