Wormwood, malaria drugs, work mainly because they are anti parasitic. What if all (or most) disease are parasitic in nature? I did a search and there is evidence that parasites can be a cause of cancer in addition to the flu we see here. Release the cure? Parasites CAN be cured. All other medicines are merely called treatments.

Here is a link to an old JAMA article https://jamanetwork.com/journals/jama/fullarticle/465832