It does seem a bit odd; ~30 cases out of ~5,000,000 doses administered?
Yes, seen thus it looks like much noise for nothing. Australia and others seem to keep happily vaccinating with AstraZeneca.
I guess it's because there aren't many days between getting the dose and showing clots in those 30 cases, but I'd need more data (and knowledge) to tell if that is still random. There're only 365 days in a year. How many cases of clots does normally one see in a year ?
How many people in 5 milion get thrombosis within 10 days of their birthday any normal year?
If I look for conspiracy theories I might also go the other way. There were some studies last week suggesting 80% efficacy in preventing asymptomatic COVID-19 for Pfizer/BioNTech (and that's assumed to mean in preventing contagion). I think it was an unreviwed paper from the manufacturer. They have privileged data sets of something like all clinical records from Israel (they got them in exchage of sending -expensive- doses there earlier). I wonder how are they going to review that paper. The peers won't have access to the whole dataset, so if the Pfizer researchers wanted to pick and choose a favourable subset, I wonder who could catch them redhanded. Coincidentally also last week there started to be media noise about the cheapest competitor, Astrazeneca, and their alledged unlisted thrombosis effects. There was already background reluctance in Germany about AstraZeneca. If it was a spin campaign, which doesn't have to be, it might be sound or it might be just spontaneus hysteria, but if it were viral (pun intended) misinformation, cui prodest ?
I prefer not to draw conclusions. I think this time I'm going to believe whatever EMA says tomorrow (I'm fortunate enough to be low risk and so I'm still far from any personal decision on vaccines).