Good for you. Did you ever have schistosamisis? Don't think so just because your supplements work for you doesn't mean it's going to cure someone with a serious infection.
Doubt you can even one claim of someone saying vitamin c cured their schistosamiasis infection. People post a lot about treating parasites with meds and herbs many people have gone to medicine for a reason. People aren't all the same. What works for one person may not work for everyone. Vitamin c and de wont cure every virus and disease on earth that is just simply absurd.