This particular syndrome is a combination of blood clots with corresponding LOW platelets. It's a rare situation that can happen spontaneously after viral infections or in patients receiving heparin.
It is different from the mechanism that causes blood clots to form from hormonal birth control pills.
However, it seems women of childbearing age are more susceptible to CVST/SVT with low platelets, and it seems to have something to do with antibodies mistakingly attacking blood cells. Women, in general, have stronger immune systems than men and have stronger vaccine immune responses than men as well. This seems to be a rare case of a hyper immune reaction. I wonder if these women would have also developed clots if they were infected with Covid-19. They likely would have.
These types of clots are happening at a rate of 165,000 per million in Covid patients. So far, with J&J, we are at a rate of approximately 6 in 4 million shots given. So, the risk of this syndrome happening is obviously much higher in actual covid infection.
It should be noted, this is a treatable condition which is good.
I think the pause for review is a GOOD SIGN that our vaccine safety monitoring system is WORKING as intended. This should make people feel more confident, not less. I imagine there will be a change in who receives this vaccine going forward.