Wait, I got it: Magic! Someone must have cast a hex on them!
No wait that's not it how about: They displeased the gods!
Perhaps they were nasty people in a past life and have to atone in this one?
Note how all of the references for "enhanced sympathetic activity" are papers written by Wyller! He takes self-citation to a whole new level.
Studies of adults have not found differences in levels of catecholamines compared to healthy controls. The concept of "sustained arousal" also...
I don't get too excited about results that largely overlap with healthy sedentary individuals like most of the cortisol studies I have seen.
If it was a cause, it would already be considered a biomarker.
Why are they even at the hospital getting scans if they aren't sick. There have been several "asymptomatic" cases discussed recently. The first is an individual had shortness of breath but no fever, but was considered "asymptomatic" as the doctors claimed the shortness of breath and mild cough...
I've already addressed this nonsense about there being any significant proportion of individuals who magically have COVID without ever having any symptoms... (don't confuse reporting biases, test contamination, lack of test specificity or pre/post symptomatic cases with "asymptomatic" cases.)...
https://www.nejm.org/doi/full/10.1056/NEJMoa2022483
Notable aspects: the highest dose (250 μg) caused headache in 100% of recipients, fever in over 50%, along with severe fatigue in some recipients of this dosage. One recipient in the lowest dosage (25 μg) group had a significant immunological...
It wouldn't say it is "quite common", but there are false positives, typically due to contamination.
It's also possible that the first infection was SARS-2, it wasn't fully cleared and the second infection is something else.
Some interesting ideas, and definitely worth studying, but I'm not convinced the issue of pain sensation is just in the muscle spindles themselves.
For example, pain thresholds in muscle fascia have been shown to be increased due to DOMS, https://pubmed.ncbi.nlm.nih.gov/25519953/
Type II...
While cerebral vessels are structurally different (thinner walled, lack external elastic lamina and thus have a lower range of contractile diameters), they do have well developed inner elastic lamina, and it is possible to have disturbed cerebrovascular myogenic reactivity...
The difference is probably due to travel restrictions and employers not expecting their employees to come into work when ill! ;)
It remains to be seen if this proactive behaviour will remain in 2-5 years time.
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