I don't know why this article says nobody heard about any of this.  Vaccine-induced immune thrombotic thrombocytopenia has been a concern since late 2020.  DVT is right along that same list of issues.

 I talked about it here before regarding mRNA-1273 and arrhythmia.  In this case 8.65 per 100,000 is pretty high, and while there will be a "weigh your odds" strategy, the bottom line those odds need to be within that age group, not overall age groups.