I have read various claims along the lines of 'viruses don't exist'. I personally don't agree with that idea but am open to all possibilities since I haven't personally used a lab to explore the subject and I generally only trust my own experience enough to say for sure that i know or don't know about a subject.
In the case of that link, the claim made about meningitis is certainly not true. My own father nearly died of meningitis a few years ago and he was not on any drugs.