Hookworms may help stave off type 2 diabetes.

newatlas.com/medical/hookworm-trial-diabetes-chronic-diseases/

The paper by Australian researchers, published in Nature, suggests that the anti-inflammatory response triggered by the parasitic worms helps counteract the metabolic processes that lead to diabetes and other health conditions.

Hookworms have also been suggested as a treatment for autoimmune diseases for much the same reason.

arc.gov.au/news-publications/media/feature-articles/combatting-autoimmune-diseases-humble-hookworm

Not sure about the backgrounds of the researchers other than Australian, but they seem to think parasitic worm infections are a good thing,