I’m going to treat all this “highly unusual” symptoms stuff with a pinch of salt until I hear a scientist say it, with data. I’m old enough to remember when children’s wards were filling up in January as a result of the new strain.
Indeed. The description by the Danish friend above sounds like disseminated intravascular clotting which is rare but can have many causes (cancers, sepsis, some snake bites...). Clinical trial experts will be aware of it though and will be all over it if it happens and seems to be drug-related.
If there are any in the UK, the MHRA will be making sure of the likelihood of risk and causality before going to press, unlike some other organisations or doctors by the look of things.