I mean, how often are humans found infected by worms and reported in proportion to all pork eaten ?

Looks like they are called these names

Parasite/Disease	Type	Disease(s)	Transmission
Trichinella spp.	Helminth	Trichinosis	Undercooked pork/game meat
Toxoplasma gondii	Protozoa	Toxoplasmosis	Cat feces, undercooked meat
Sarcocystis spp.	Protozoa	Sarcocystosis	Undercooked meat, contaminated food
Taenia spp.	Helminth	Taeniasis, Cysticercosis	Undercooked beef/pork