This Master Trainer Manual is based on a three-day training of trainers (ToT) session for 25 participants, ideally made up of those who train vaccinators directly. Search terms: How to Vaccinate, Interpersonal Communication (IPC), Finger Marking, Tally Sheets, Door or House Marking, Compiling Reports, Missed Children / Refusals, Returns, Special Teams (Transit and Migrant Populations), Training