18th century 20th century nothing really changes!!

Medical knowledge in the 18th century did not understand bacteria and germs and how they could be transmitted. They did not properly sterilize the tools and equipment, and bacteria could easily spread from patient to patient during a days worth of operations. This lack of understanding of germs and bacteria led to the spread of disease that killed more soldiers than enemy bullets during the entire war.

Medical knowledge in the 20th century did not understand mercury and disease and how they could be related to Amalgam fillings. They did not properly study the long term effects and consequence, and bacteria could easily spread from tooth to loss of tooth during a days worth of work. This lack of understanding of germs mercury and bacteria led to the spread of disease that killed more people than enemy bullets during the entire war. Tweet