Ar - Rāzī, a ninth - century Persian considered by some to have been the greatest physician of the Islamic world of that time, wrote the first medically accurate description of smallpox.
Ar - Razi, üheksandal sajandil elanud pärslane, keda mõned peavad tolle aja islamimaailma silmapaistvaimaks arstiks, esitas esimese meditsiiniliselt täpse rõugete kirjelduse.