Dark Web Marketplaces and COVID-19: before the vaccine Alberto Bracci, Matthieu Nadini, Maxwell Aliapoulios, Damon McCoy, Ian Gray, Alexander Teytelboym, Angela Gallo and Andrea Baronchelli EPJ Data Sci., 10 1 (2021) 6 Published online: 21 January 2021 DOI: 10.1140/epjds/s13688-021-00259-w