Fifteen billion people in the whole world suffer dementia which causes much forgetfulness in learning, and also about ten billion people get dementia every year (WHO).
Mmadụ ijeri iri na ise n'ụwa nile gburugburu na aria ọria nsogbu ubụruisi nke na-ebute oke nchefu na nsogbu ọmụmụ ihe, tinyekwara ihe ruru mmadu ijeri iri na enweta oria a kwa afọ (WHO).