Obligatory Long COVID post: I have two known COVID infections, despite a high level of precautions since 2020.
I incurred post-acute sequelae from my first infection. First, persistent brain fog, killing my cognition for a full month. It lingered a while after that, but one month of total impairment.
That's also when I started noticing POTS-like dysautonomia symptoms. I get extremely winded changing my posture. Those have persisted for 4 years.
Specialists I've seen have done nothing.