How long does acquired immunity last after being infected with Corona??

Dr.. Orwa Muhammad Hani Al-Malli

The latest scientific findings regarding the duration of acquired immunity after infection and the possibility of a second infection
Immunity after infection is often long-term, and the second infection is limited. This is a summary of the new studies.
88% of those infected had the antibodies for at least six months. And 99% keep them for three months.
Even in the absence of antibodies, cellular immunity persists for at least 8 months
Thus, we cannot deny that immunity after infection may take a year or years, but this needs longer time to prove