I keep getting viral infection symptoms (sneezing, congestion, constipation and diarrhea, lightheadedness, etc.--no fever), but the COVID test is always negative when I am experiencing them. I got the antibody test at the end of the first year of the pandemic, before vaccination was available, and I have had the original vaccine in 2021 and both boosters, and never had any noticeable reaction to any of them. I don't remember if insurance paid for the test in 2020, which my doctor had recommended.