fenbendazole has been proven to be effective against several types of cancer in several studies. the reason it's not an official treatment is because no sane pharma company would spend the hundreds of millions of dollars necessary to get through the phase 1 - 3 studies necessary to get it approved as a cancer drug only to have competitors produce it extremely cheaply because they can't get it patented. another problem is if it actually cures cancer then many large pharma companies have incentives to not promote it even if they can profit from it (which they can't) because that would mean expensive treatments such as chemo would no longer be necessary.
Sweden