I don't get what you are saying, you actually mention compounds can make someone sick when they enter the skin via a wound. Germ theory would not deny this lol. What compounds are you referring to? If you understand chain of infection you would know that there is a point of entry. So yes a wound can be one. But so can any other opening to the body (ie, airways, peri-genital area, breaks in skin, etc). The compound causing the disease is more than likely a microbe of some kind (ie, bacteria).
Most of germ theory denialism is based on people who hold onto the belief that Antoine Béchamp germ theory was more valid than Louis Pasteur. Béchamp did not out beat Pasteur theory at the time because scientifically Pasteurs research had more evidence and was widely accepted by scientist of the day. It's also been consistently validated over the years to further add credibility to this theory. In fact Béchamp, though often gets tied to the modern quackery of germ theory denialism, did actually put forward some sound ideas that still play a role in our understanding of how disease forms. I think most scientist agree with the assertion that the "terrain" can also impact development of disease. Hence the need to have proper nutrition. Also as science has progressed we've also learned that certain microbes are even needed for our bodies and play a role in homeostasis and overall good health. We have a symbiotic relationship with certain microbes as they require us to survive (ie, gut flora) and we need them for our health.
LOL how can I ever show proof to someone who has already made up his mind that every study linking a virus to a disease has been proven false? Please show me your evidence that every study has been proven false considering there are thousands of studies on this topic .