I think all in all. Our Immune Systems fucked up due to different stressors. It was just too much and the system needed more and more energy to stay active. During this process
pathways get altered, receptors desensitized and mitochondria shift towards immune protection (or even get fragmented due to viral overload) rather than metabolism.
This can happen over time due to accumulation of stressors or with one trigger. But this trigger is never alone. There‘s always a second trigger like stress.
When I had Covid I was hiking a mountain and swam in ice cold water 2h before the onset of symptoms.
The viral load was at its highest when I was working out heavily. The immune system weakened due to the
open window effect and was busy repairing the damage in my muscles when the virus hit.
Did you know that your system is down for up to the 3 days after heavy exercise? In this time you are more vulnerable to infections.
So wasn’t able to do both, repairing and fighting. With my heavy activity I gave the virus the chance to spread all over my body pretty fast. My heart was pumping. Additional viral load means more work. So it all adds up.
My immune system was irritable anyways with autoimmunity. So it did his job, but worked so heavy that some parts were just not properly fixed or healed or even attacked by autoimmune processes.
I think our immune systems got out of whack somehow. Everybody has his own main battle field. For me it’s my muscles, due to the heavy hiking. I won the fight but lost some good soldiers.