Study in Primates Finds Acquired Immunity Prevents COVID-19 ReinfectionsHere is a hint, coming up with reasons that reality is not reality does not change reality.
Millions of people are getting Covid-19 twice. Outbreaks are happening in the same population time after time. Clearly immunity is not lasting very long.
While the shortness of Covid-19 immunity is unusual, having immunity fade over time is not unusual. Claiming it is impossible is just silly.
https://directorsblog.nih.gov/2020/...ired-immunity-prevents-covid-19-reinfections/
https://www.medicalnewstoday.com/articles/can-you-get-coronavirus-twice#immunity
Specialized immune cells, called B-lymphocytes or B-cells, identify proteins called antigens on the surface of invading cells.
When a B cell detects a new antigen, it causes the production of proteins, called antibodies, that bind to antigens.
Once an antibody locks onto an antigen, it attracts other cells that destroy the target.
When B cells produce a new antibody, they can continue making the same antibody if the same antigen appears in the future. This is called adaptive immunity.