Here is just ONE of the studies. It’s too technical for me to understand well, but maybe people that need it will see it and spread the knowledge...........
https://ar.iiarjournals.org/content/43/3/1207.abstract
An increasing number of studies are reporting anticancer activity of widely used antiparasitic drugs and particularly benzimidazoles. Fenbendazole is considered safe and tolerable in most animal species at the effective doses as an anthelmintic. Little is known about the redox-modulating properties of fenbendazole and the molecular mechanisms of its antiproliferative effects. Our study aimed to investigate the possibility of selective redox-mediated treatment of triple-negative breast cancer cells by fenbendazole without affecting the viability and redox status of normal breast epithelial cells."
Anthelmintics attack the parasites themselves, and the dead and dying parasites are naturally expelled. There is a whole class of them, so the one being examined is one in a range of alternatives. Redox is a relatively new word combining "reduction" and "oxidation," and if encouraging the body -- which tends towards health most of the time -- to reduce cellular oxidation and therefore damage, then this class of drugs may well simply and effectively support the immune system as it does its God-given role in health. Again, such would cut into the profits of "big money" which wants to market mostly symptom alleviation. It is to be wished that more is learned quickly, and much of this research is being done outside the "long arm" of the FDA. Best wishes.