I had an CMV and EBV related sickness in 2017, it wasn't until 2021 or 2022, well into COVID, that I returned to anything near my previous ability to run, work

I had an CMV and EBV related sickness in 2017, it wasn't until 2021 or 2022, well into COVID, that I returned to anything near my previous ability to run, work late, or concentrate.