Jerusalem’s Hadassah Hospital is cautiously optimistic after the world’s first passive immunization of a critically ill coronavirus patient. After an injection of Kamada’s IgG antibody product (see here), a CT-scan of the lungs showed some improvement and doctors are hopeful of a recovery.
http://www.israelnationalnews.com/News/Flash.aspx/505083
https://hadassahuk.org/new-innovative-hyperimmune-therapy-for-covid-19-at-hadassah/