Putting this here so I can find it again.
TL;DR: #COVID fucks up the immune system and AGES your cells. Recovery of vital immune cells can take months, even years. Adults have a LIMITED ABILITY to create new immune cells bc our thymus is atrophied.
Your body does NOT develop immunity to new COVID strains, and “immunity debt” is a MADE-UP TERM that has absolutely NO BASIS in reality or how our immune systems actually work.