Antibodies are not MRNA spike proteins. Every human on earth makes antibodies everyday all the time to a number of pathogens. They hit the genetic lottery and found a human who’s body made an antibody that can attach itself to any SARS like spike protein that’s is a huge discovery. That one person could save millions now. It’s not hard once you sequence the antibodies RNA to clone it. You clone the antibodies not make MRNA out of it. This exactly what Eli Lilly did in the heart of the pandemic they cloned human antibodies and distributed them for IV use in the first 5 days of illness. Countless lives were saved mine was one of them. I own 50,000 in Eli Lilly stock as pay back for them saving my life. I was at 65% blood oxy and 104F fever by day five of covid for me. I was technically outside the window for the emergency use licence my GP gave it to me anyways as compassionate use since I was already on the way to a ventilator and 100% O2 at 4L per min. 8 hours after the antibodies infusion my fever was down too 102 and my blood oxy up to 70, 24 hours later I was under 100F and mod 70s by day four after I was mid 80s and on my way out of the hospital nothing short of amazing. I never took any of the vaccines since I sequestered for the first 10 months doing remote drilling via 4/5G or solo field geology work far from people. It wouldn’t be till Sept 21 when I would finally need covid head to head. There is no need to poo poo cloned antibodies they are identical to what the original human body made in the first place. Of course you can take the RNA sequence of this antibody and then make a MRNA sequence as a injectable spike protein which would then teach the host mitochondrial DNA how to make the antibodies skipping the cloning in vats process but that gets people all wound up about MRNA when there is no need for that when you can make the antibodies directly by cloning them. This is what saved the Don’s life he also got monoclonal antibodies that were cloned from a human I think he got the Eli Lilly version too.
Your experience was about the same as one of my friends who contracted Covid in December 2020. His blood O2 dropped to the same dangerous level and they did ventilate him. He eventually developed AKI, acute kidney injury, and every time that they tried dailysis his blood pressure soared and they had to halt. He lasted maybe a week once the AKI started.
I occasionally get a ‘chimeric murine humanized mAB’ designed to suppress part of the immune system. I don’t know if mRNA could generate that mAB but it would sure beat sitting for hours attached to an IV drip line.