Germany has now permanently halted the use of AZ in under 60's.

"Germany has reported 31 cases of cerebral thrombosis in 2.7 million doses of the AstraZeneca vaccine, roughly one incident per 90 000 shots." (actually 0ne in 87k)

We're looking at up to a billion shots of AZ being administered worldwide - so that's 11 494 cases of cerebral thrombosis - and about 4600 deaths - from the first round of vaccinations.

If it was effective against variants and there were no alternatives, you'd nearly accept that, but given there are alternatives...