Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: An ɗauki miasma a matsayin tururi mai guba ko hazo cike da ƙwayoyin abubuwa masu lalacewa (miasmata) waɗanda ke haifar da cuta. Matsayin miasmatic shine cewa cututtuka sune sakamakon abubuwan muhalli kamar gurɓataccen ruwa, iska mara kyau, da yanayin rashin tsafta. Irin wannan kamuwa da cuta ba a watsa tsakanin mutane ba amma zai shafi mutane a cikin yankin da ya haifar da irin wannan tururi. Ana iya gane shi ta hanyar wariyar sa. An kuma yi imani da farko cewa an yada miasmas ta hanyar tsutsotsi daga ulcers a cikin waɗanda annoba ta shafa.A cikin karni na 1 BC, marubucin gine-ginen Roman Vitruvius ya bayyana yiwuwar tasirin miasma (Latin nebula) daga ƙazantar ƙazanta lokacin ziyartar birni:  Tambaya: WACE MUTANE ne suke da ra'ayin da bai dace ba?
cututtuka sun kasance sakamakon abubuwan muhalli kamar gurɓataccen ruwa, iska mara kyau, da yanayin rashin tsafta