Adenoassociated viruses (AAVs) have been the center of intensive research since their fortuitous (incidental) discovery in 1965 as a contaminant in a simian adenovirus preparation (1). Initial scientific interest primarily focused on understanding the fundamental biology of this virus type, but later it was harnessed to serve as a genetic vector for use in treating or even curing certain genetic diseases (2). Many distinct characteristics make AAVs a versatile tool for development of clinical candidates, exemplified currently by more than…