TOKYO, Jan. 20, 2023 /PRNewswire/ French Raoul Follereau Fondation, Italian Association Amici di Raoul Follereau and Sasakawa Leprosy (Hansen's Disease) Initiative, in collaboration with the Dicastery for Promoting Integral Human Development, will co-host the "International Symposium at the Vatican on Hansen's Disease: Leave No One Behind" on January 23-24, 2023 at Auditorium "P. Agostino Trape", Patristic Institute Augustinianum..