Did you ever test positive for antibodies? Or just test positive for covid?
Most recovered COVID-19 patients mount broad, durable immunity after coronavirus infection
www.precisionvaccinations.com
The immune systems of more than 95% of people who recovered from COVID-19 had durable memories of the virus up to eight months after infection.
www.nih.gov
There are always exceptions to rules. I hate anecdotes because it is not evidence. But in the last month 2 fully vaccinated (pfizer) guys at work and my own little brother (Pfizer as well) all got sick with Covid and all were symptomatic.
Both my parents had Covid back in August and up til February still had their antibodies. They still got vaccinated as they are quite afraid of the virus and they do fall in the high risk category.