Like you, I can only relate my personal experience. In November, 2019 - 2 to 3 months prior to official recognition of the CoViD infestation - I had a persistent bronchitis. With Rx and non-Rx self treatment I was able to control the illness but it took some time to overcome it.
Last December, since blood tests for CoViD antibodies had become available, I took one and it tested negative. Presumably I was not an early victim of the ensuing pandemic of 2020. Bronchitis is not 'flu' so I assumed it was just some seasonal malady. Was my test accurate? In light of recent developments, if CoViD-19 did not actually exist, what exactly was I tested for?
We know (I think) that SARS (severe acute respiratory syndrome) exists; SARS is identified as a zoonotic form of coronavirus. Zoonotic may well be the key here. It means that an infectious pathogen has jumped from an animal species to humans.
However, evidence is growing quite convincingly the SARS-CoV-2 (CoViD-19) is NOT zoonotic but engineered! Therefore, what are we testing to detect? What are we vaccinating against? What are thousands of people dying from?
Thanks for the account of your experience; was it an igG or t-cell test?
My line of questions was to figure out whether testing methods hid or bore out the possibility of mistaken identity, counting flu as covid.