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30+ Astra Zeneca Covid Vaccine Mechanism Pictures . Astrazeneca's coronavirus vaccine is coming under intense scrutiny after its uk scientists made a major mistake during trials. The process of distributing the medicine, however, could prove a logistical challenge. European Union warns AstraZeneca over delay in delivering ... from s.yimg.com Physically getting the vaccine to all of the more than 330 million people living in the u.s. Denmark announced thursday it will temporarily suspend the use of the coronavirus vaccine developed by astrazeneca and the university of oxford. Astrazeneca's coronavirus vaccine is coming under intense scrutiny after its uk scientists made a major mistake during trials. As a result, the oxford vaccine doesn't have to stay frozen. Clearance, marking the first approval worldwide for a shot that will be key to mass immunizations despite continu...