I catch a cold yesterday while working, finished my shift and went home. 4 hours later I was so tired I laid down on my bed and woke up at 4am the next day, meaning I slept for 10 hours straight.
I called in sick and went back to sleep. 4 more hours.
I woke up, cooked something, ate, watched netflix and kept falling asleep. I started feeling like a person at 2 pm.
I went walking in a park for 30 minutes and went back home, started reading some epubs started having a headache and feeling tired, called in sick for a second day in a row and if tomorrow I feel like this, it’s gonna be the third day in a row I feel tired and very strange, like not completely awake but not tired.
I was hoping to go to the doctor today, but I’m so tired.
I didn’t feel so tired while walking those 30 minutes I mentioned. Now I wonder if walking outdoors makes people feel more awake, because the air has more oxygen than inside my bedroom and if I should open the windows to let some fresh air inside.
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That’s not how your immune system works. Your immune reserves are not “spent” nor do they need to replace ones “lost”. It’s not like a military battle. Most pathogens are either destroyed or they avoid destruction through some mechanism - they’re not often fighting back against the WBCs.
Your immune system produces chemicals that make you feel like shit / tired, because it’s evolutionarily advantageous to feel like shit. This keeps you resting and away from others. This is also how medicines like NSAIDS or steroids can make you feel better, by inhibiting the processes instigated by WBCs. It’s not the disease that makes you feel bad, it’s your immune system (unless you’re deathly ill, we’re talking common cold/flu/COVID type stuff here).
It would be impossible for me to go in depth in immunology but your explanation is not at all in line with the evidence we have currently.