Blood clots only affect less than 1 in 200,000 recipients of the Astra Zeneca vaccine, and mortality is low, at around 1 in a million. But even this tiny risk has caused a lot of vaccine hesitancy in Australia, where the government bet big on just that one vaccine manufacturer.<p>Even though the risk is small, it was scary because they didn't know the mechanism causing the clots, so it was possible that worse problems would become apparent later on.<p>If this scientist has identified the mechanism, and a fix is implemented, it would remove the uncertainty about the Astra
Zeneca vaccine.<p>Or would it?<p>Once something like this is out, and vaccine hesitancy gains a following, reversing its momentum might not be as easy is publishing science.