What if some specific apparent causes of diseases affecting you could be identified? They may then be researched and eliminated?
You may be able to provide information to aid that goal. The key is identifying and then tracking potential causes.
If factors that provoke diseases can be identified and ameliorated, the incidence of specific diseases might be reduced. If the forces that promote diseases can be identified, the severity of specific diseases might be reduced.
Imagine that the damaging effects of asbestos had been known and understood 80 years ago. How many factory and construction workers could have been spared painful cancer and lung diseases and lived longer, healthy lives? Imagine that children of decades past had understood potential dangers of smoking. How many children would have never started smoking, how many adults would have quit sooner, and how many people would have been spared cancer and other debilitating lung diseases?