[DrBazza]

There's no guidance on how to read that.

I suspect it's probably "possible side effects and deaths within 28 days of administering a vaccine", in the same way that the UK records "deaths within 28 days of a positive COVID test". One does not imply the other was the cause. (edit) other commenter points to the official UK docs.

Even with that information, you need to know the non-vaccine incidence of the illnesses in that report to make any meaningful comparison and assessment of the efficacy of the vaccine. Which is what I rely on scientists to do.

From the horse's mouth:

Ann Taylor, Chief Medical Officer, said: “Around 17 million people in the EU and UK have now received our vaccine, and the number of cases of blood clots reported in this group is lower than the hundreds of cases that would be expected among the general population. The nature of the pandemic has led to increased attention in individual cases and we are going beyond the standard practices for safety monitoring of licensed medicines in reporting vaccine events, to ensure public safety.”

https://www.astrazeneca.com/media-centre/press-releases/2021...