Please, see my comment #43.
A NEW AND RARE CONDITION it seems:
COVID-19 vaccines, thrombocytopenia and blood clots — what’s the story?
healthdirect.gov.auhttps://www.healthdirect.gov.au/blog/covid-19-vaccines-thrombocytopenia-and-blood-clots
. Thrombosis occurs when a blood clot forms in a vein or artery. ‘Thrombosis with thrombocytopenia syndrome’ (TTS) is a very rare, new and specific syndrome. It occurs when a person has blood clots (thrombosis) as well as low platelet counts (thrombocytopenia).
What’s the link to the AstraZeneca vaccine?
The AstraZeneca COVID-19 vaccine has been linked to thrombosis with thrombocytopenia.
Researchers are still working to understand this link. However, one theory is that, in rare cases in some people, the AstraZeneca COVID-19 vaccine might produce antibodies that react with platelets — making them ‘stick together’. (Antibodies are the proteins made by your immune system to fight off foreign substances.)
This can cause blood clots, which stops platelets (and blood) from circulating through the body.