if got poor digestive system, best to avoid raw food.
Last time got one ex colleague told me someone she knows like to
eat sashimi.. one day eat until not feeling well (if didn't
remember wrongly what she told me), went to doctor, doctor told him
got many worms inside his digestive system or stomach (forget which
one), then the doctor "catch" worm for him. After hearing this, I
got scare and from then on eat lesser sashimi, and if eat sashimi
will dip some wasabi in soy sauce.
Because most of us don't drink sake or japanese wine often or some
don't drink at all , maybe that's why immune system weaker to these
raw food.