Valavu ya gulugufe ya NSEN yogwira ntchito bwino imagwiritsidwa ntchito kwambiri mu mankhwala, madzi, malo opangira magetsi ndi zina zotero. Ndipo ndi yoyenera kutentha kwambiri, imakhala ndi moyo wautali wotumikira, poyerekeza ndi valavu ya gulugufe yozungulira.