As of now 'we don't know', and I think nothing less or more of those that are happy to be vaccinated and elbow their way to the front of the queue. ...
From my perch on the fence, there will always be adverse effects to any drug, just like foodstuffs (nuts, dairy, etc), so it is no more than expected...
Oh well, have to start the thankless task somewhere, to identify and trace and test tens of thousands of people that visited those 27 locations over...