Figure 5
From: Dark Web Marketplaces and COVID-19: before the vaccine
DWMs and public attention. (a)-(c) Seven-days rolling average of active listings selling PPE, together with the time evolution of the number of tweets referring to masks and of visits in the relative Wikipedia page visits. (b)-(d) Similar comparison as in panels (a)-(c) but considering active listings of hydroxychloroquine, chloroquine, and azithromycin. Black dashed vertical lines in panels (a) and (b) mark significant events related with COVID-19, see Appendix C. See Appendix D for panels (a) and (b) with a linear y-axis