Transduction efficiency is difficult to quantity in a complex multicellular model such as the organoids, and it varies depending on the AAV serotypes. In a collaborative paper, transduction efficiency has been evaluated by co staining of cell specific markers and transgene and transduction efficiencies of up to 37% have been achieved.
Mc Clements et al,(2022)  Transl Vis Sci Technol.;11(4):3 https://doi.org/10.1167/tvst.11.4.3