A lot of sciences find core assumptions were not complete or based on the wrong thing. Health practices that have been around for millenia, like like food safety and sanitation, were successfully implemented using the wrong causes because they addressed the real causes. While they were not called science, they still used the same practices of comparing outcomes in the ways available at the time.
Bloodletting was originally to let out evil or something, then was used in formal medicine successfully but the cause it addressed was incorrect. Now we have much better ideas of how and when it helps to make it even more effective, but the underlying reasons and the methods changed completely.
A lot of sciences find core assumptions were not complete or based on the wrong thing. Health practices that have been around for millenia, like like food safety and sanitation, were successfully implemented using the wrong causes because they addressed the real causes. While they were not called science, they still used the same practices of comparing outcomes in the ways available at the time.
Bloodletting was originally to let out evil or something, then was used in formal medicine successfully but the cause it addressed was incorrect. Now we have much better ideas of how and when it helps to make it even more effective, but the underlying reasons and the methods changed completely.
Bloodletting is still a thing, but it’s called therapeutic phlebotomy.
Source: I have too much iron in my blood so I have to be bloodlet