Due to COVID restrictions the 15th ACH2 annual scientific workshop was held online via zoom in November 2020, organised by Joanne Camilleri, Chaturaka Rodrigo, Nadia Warner, Andrew Harman and Jennifer Juno. Guest speakers were Sharon Lewin (HIV), Scott Bowden (Hepatitis), Thomas Tu (Hepatitis) and Damian Purcell (HTLV).