translation.en: It is thought that as an animal/bird influenza adapts to humans and becomes transmissible, it also loses some of its pathogenicity for humans.
translation.is: Með tímanum, þegar fleiri og fleiri koma sér upp ónæmi og heimsfaraldursveiran breytist, glatar hún hluta af sýkingarmætti sínum gagnvart mönnum.