Especially in high-income economies like ours, a large fraction of deaths is caused by slowly progressing diseases: heart disease, chronic lung disease, cancer, Alzheimer's, diabetes, just to name a few.
Specialmente in economie ad alto reddito come la nostra, una buona parte dei decessi dipende da malattie a progressione lenta: malattie cardiache, malattie polmonari croniche, cancro, Alzheimer, diabete, solo per citarne alcune.