What preventive measures can help prevent diseases caused by parasitic flatworms?

It all depends on the type of worm, because each enters the body in different ways.
For example, bovine and pork tapeworms enter the body with the use of animal meat that has undergone insufficient heat treatment.
Infection with the liver fluke occurs when drinking water from reservoirs near which livestock (cows) are grazing, which are the main hosts of this parasite.
Also, to avoid infection with any type of parasitic worm, you must follow the usual rules of hygiene (for example, wash your hands).