The ongoing COVID-19 vaccination campaign has so far targeted less than 10% of the world population, and, even in countries where the campaign has started, many citizens will not receive their doses for many months. There is clear evidence that previous shortages of COVID-19 related goods (e.g., masks and COVID-19 tests) and services pushed customers, and vendors, towards illicit online trade occurring on dark web marketplaces. Is this happening also with vaccines? Here, we report on our effort to continuously monitor 164 dark web marketplaces. By April 20, we found 214 listings offering a COVID-19 vaccine, 77 of which offering officially approved vaccines and 25 fabricated proofs of vaccination. The number of currently active listings is 34, including eight listings offering the Pfizer/BioNTech vaccine, six the Moderna, two the AstraZeneca/Oxford, two the Sputinik V vaccine, and nine offering fabricated proofs of vaccination. Illicit trade of uncertified COVID-19 vaccines poses a concrete threat to public health and risks to undermine public confidence towards vaccination.

翻译：目前进行的COVID-19疫苗接种运动迄今以世界人口不到10%的人口为目标,甚至在开展该运动的国家里,许多公民数月内不会接种疫苗,有明显证据表明,以前与COVID-19有关的商品(例如口罩和COVID-19测试)和服务短缺,迫使客户和销售商在黑暗的网络市场上进行非法在线交易,这是否也与疫苗有关?在这里,我们报告我们不断监测164个黑暗网络市场的努力。到4月20日,我们发现214份清单提供了COVID-19疫苗,其中77份提供了官方批准的疫苗和25份编造的疫苗证明。目前积极列入名单的有34份,其中包括8份清单提供了Pfizer/BioNTEch疫苗、6份现代疫苗、2份Astrezeneca/Oxford疫苗、2份Sputinik V疫苗和9份编造的疫苗证明。未经认证的COVID-19疫苗的非法贸易对公众健康构成具体威胁,并有风险破坏公众对疫苗接种的信心。