Looks like this may be a bit more relevant than many of the snarky comments would suggest - the relevant German authority on this said that they have seen a unexpected increase in a specific type of blood clotting issue that usually is very rare: https://www.pei.de/DE/newsroom/hp-meldungen/2021/210315-voru...
> Birth control pills can also cause thrombosis. So why is there all the fuss about the COVID-19 Vaccine AstraZeneca? It is true that for birth control pills thromboses, even with fatal outcome, are known as a very rare side effect. They are listed in the Summary of Product Characteristics (SmPC). The birth control pill is available only on prescription. Every woman must be informed of this risk by the prescribing physician. For the COVID-19 Vaccine AstraZeneca, there is currently a suspected very rare side effect of sinus vein thrombosis with accompanying platelet deficiency, sometimes fatal. It is not listed in the SmPC. The consideration of whether the vaccine can continue to be used even though it may cause this very rare side effect (if necessary, after this risk has been added to the SmPC) will be made at the European level by the European Medicines Agency (EMA) and at the national level by politicians. The procedure has been initiated.
Which sounds pretty clearly like bureaucratic CYA instead of an actual cost/benefit analysis that takes into account the excess deaths that are now being caused due to pausing the vaccine rollout.
"This potential side-effect is not listed in the SmPC so we need to pause vaccinations", ignoring the fact that hundreds of people are dying every day in Germany (https://www.google.com/search?q=germany+covid+case+fatality+...).