I’ve read that it occurs in anemic patients, so heparin, a common clot buster is absolutely the wrong drug to use to treat these patients.
Does that mean that people who are anemic for whatever reason are at higher risk?
Premenopausal women, i.e., those who lose blood every month via menstruation, are more likely to be anemic, but that doesn’t explain the cause of the autoimmune aspect.
Any sort of screening test they can do based on such a limited risk is likely to make the cost of the vaccine go sky high.
The Astra Zeneca vaccine is also based on an adenovirus vector, and has had a similar tiny handful of patients with blood clot problems.
The J&J and Astro Zeneca vaccines were expected to be the vaccine of choice for third world countries because they do not require sub-zero storage temperatures to remain viable, and the one shot dosing is far easier from a logistical standpoint.