COVID-19 vaccines have been rolling out for a few months. The nature of the pandemic and the number of people impacted by it mean that demand for these vaccines is enormous. High demand for vaccines makes interference with the supply and their distribution excellent leverage for coercion and extortion. Attacks against resource supply like this are nothing new ‘ we have been poisoning wells (literally and figuratively) since medieval times. Unfortunately, our supply chains and industrial facilities are horribly exposed and adequate defenses are going to take us time to get in place.
Source: https://www.helpnetsecurity.com/2021/06/24/opsec-threats-covid-19-vaccination-efforts/