@TerminalAutism @digdeeper @ryo Well that's only about viruses, not pathogens in general. Microorganisms DO exist and given that they do eat other cells, it's safe to assume that they can do damage if they are inside of you. And I do know that some bacteria (not viruses) can cause cold or flu-like symptoms. If viruses really don't exist, then I assume most pathogenic diseases are caused by bacteria.
As for viruses in particular, I don't know really. They are said to be much smaller than cells and nobody can conclude whether they are living or non-living and their entire existence seems to contradict what we know about evolution (on theory I heard claims that viruses are really loose Ribosomes).
However, my doubts also come from the fact that these germ theory deniers also tend to be flat-earthers, who I really believe are a psy-op.