It was the Ioannidas (Stanford Prof) metastudy: https://www.medrxiv.org/content/10.1101/2020.05.13.20101253v3 "Among people <70 years old, infection fatality rates ranged from 0.00% to 0.57% with median of 0.05% across the different locations (corrected median of 0.04%)" The corrected (final conclusion) median IFR is 0.04%