Quote:
Originally Posted by Macindoc
"Natural immunity" is not very effective vs. the variant strains, and then you have to decid what to do with those who had a presumed COVID-19+ status due to symptoms and known exposure without a positive test result. Two doses of mRNA vaccine are easy to demonstrate and are the most protective state.
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Actually.... exactly the opposite. If you simply have immunity from the mRna vaccination for COVID you just have antigen immunity based on just one protein (the spike protein)... if you had COVID and are immune, your immunity is based on multiple proteins in/on the virus and you also have Killer T cell immunity which has a far wider range of immunity because a variant virus can be recognized by your immune system and dealt with immediately, where the vaccine immunity may not. The virus is adapting (like the Delta variant) by changing it's spike protein, and that's why the vaccine's are failing against it, even though the virus is 99.9% identical to the original strain, the difference, the spike protein. People that have had some sort of COVID influenza or SARS (2003) previously are finding out that they are also immune from COVID even though those viruses are only 80% or so identical to COVID19 - having Killer T cells recognize some of the proteins on a virus are good enough for your immune system to react to that strain and start the immune response immediately. If you only recognize the spike protein, the protein that varies the most from strain to strain I might add... that's not long lasting immunity. Science.