Complex sentence: Wernicke encephalopathy may be present in the general population with a prevalence of around 2%, and is considered under diagnosed, probably many cases are apatients do not have symptoms presumed to be associated with WE.
Split into simpler sentences: Wernicke encephalopathy may be present in the general population with a prevalence of around 2%, and is considered under diagnosed. It can present a range of symptoms and most cases are not diagnosed, probably because patients do not have symptoms presumed to be associated with WE.