According to cybersecurity research firm Check Point, there has been an exponential growth in market activity for fake coronavirus vaccine certificates. The primary mode which is being used to sell fake vaccination certificates is Telegram
source https://timesofindia.indiatimes.com/gadgets-news/these-countries-may-have-a-big-fake-vaccination-certificate-problem/articleshow/85237646.cms
source https://timesofindia.indiatimes.com/gadgets-news/these-countries-may-have-a-big-fake-vaccination-certificate-problem/articleshow/85237646.cms