Atti della Accademia Peloritana dei Pericolanti - Classe di Scienze Medico-Biologiche is a serial publication issued by Accademia Peloritana dei Pericolanti (APP), a scientific society formed at Messina (Italy) in 1729. The current APP transactions started out as periodic news sheets containing the notes and reports presented by the members of the divisions (Classi) into which the Academy has been and still is organized, according to subject areas. The more recent historical thread of the present publication can be traced back to Atti della Reale Accademia Peloritana (ISSN 0365-592X), regularly published with annual frequency since 1878. In 1936 this latter publication split into five sections, one of which was Atti della Reale Accademia Peloritana - Classe di Scienze Fisiche, Matematiche e Biologiche (ISSN 0365-5520). Then, in 1943 the Division of Physical, Mathematical and Biological Sciences was separated into two autonomous divisions: “Physical, Mathematical and Natural Sciences” and “Medical and Biological Sciences”. Correspondingly, two new publications stemmed from the former one, one of which was Atti della Accademia Peloritana dei Pericolanti -Classe di Medico Biologiche, whose printed version (ISSN 0365-359) has been replaced by the current online version (ISSN 1828-6550) since 2006.