I have had a couple of friends attempt to donate blood recently who were turned away because the machines weren’t able to draw from them.
Tubing issues were blamed first.
Eventually, the staff told them they couldn’t donate because the flow was being blocked by clots.
In both arms.
These people are all under the age of 35, by the way. And were under the impression they had no health issues.
Very few of them understood that the falsely advertised drug [covid mRNA jab] that they took wasn't really a "vaccine" by any definition of what they had previously understood a vaccine to be, up until that point in their lives. Those people were all deceived by deliberate fraud.