I think it seems like a direct path between hearing what kills the virus outside the body (light, heat, disinfectant) and then saying OK, how do we get those th

I think it seems like a direct path between hearing what kills the virus outside the body (light, heat, disinfectant) and then saying OK, how do we get those things inside the body? Then ignoring potential bad consequences of what happens when you get those things in your body.