I got the sickest I have been in years in December 2019. I had a cough for about 6 months afterwards that was sufficiently bad that I had a chest x-ray to rule

I got the sickest I have been in years in December 2019. I had a cough for about 6 months afterwards that was sufficiently bad that I had a chest x-ray to rule out lung cancer. My partner got sick shortly after I did with similar symptoms. I suspect it was the flu though. My desk neighbour at work was hospitalised for the flu (tested and confirmed) a week earlier. I had been vaccinated, but it's mayve the case I had a more mild case than he did thanks to the vaccination. That being said, my partner is a nurse and was the only person in her department not to get covid. WE did get tested for covid antibodies in late 2020 and didn't have any, but it's possible they had diminished by then if it really was covid. But the simplest explanation is still that it was just the flu.