The Unkle wrote:
Getting vaxed after you already have the Covid antibodies is moronic
This misinformation that could encourage people to not get vaxed after having covid is moronic. Immunology PhD here again to debunk misinformation. I'll try to make it simple.
Natural COVID infection results in activation of a wide variety of antibody-producting plasma B cells that will turn into memory B cells that can make those same antibodies again upon reinvention. The antibodies bind to parts of the virus, the parts are termed antigens. However, the antibodies aren't always neutralizing bc COVID is a complex little virus with many parts/antigens, and antibodies get made against all those parts/antigens (regardless of whether they actually neutralize the virus) bc your adaptive immune system is indiscriminate in that way (it plays a sheer numbers game and produces an almost limitless antibody repertoire in hopes that some are useful). So you essentially active an army, but lost in the shuffle of that vast army are the few important soldiers/B cells that are actually worth anything against COVID bc of the antibodies you produce.
The advantage of the vaccine is that it results in the production in your body of the COVID part/antigen that, if an antibody is made against that part/antigens, it will be neutralizing and prevent the virus from fusing with and infecting host cells. This is the principle that had made vaccines work for decades...it focuses all the immune systems resources on activating & expanding only the specific cells that result in protection. And in turn, only these cells will have the memory recall too.
Summary: "Covid antibodies" is a useless term without context, because the antibody repertoire produced from natural infx vs vax is very different. The latter repertoire is tailored to provide lasting, specific protection via expanding B cell pops that produce neutralizing Abs. The former...good luck.