I will bet that natural immunity lasts years!!!
I already know I am immune.
Or until China, with the help from Fauci's cronies, unleashes a modified virus that the COVID immunity won't stop. Of course, China will go unpunished again.
influenza antibodies apparently last a lifetime
http://content.time.com/time/health/article/0,8599,1835907,00.html
I’ve not been able to find anything that says Covid antibodies last more than eight months, but there are people who got infected with Covid in 17 months ago in March 2020 that could be tested.