If the human immune system is soooo... complex and we haven't even detailed the immune system genes, then what on earth are we doing trying to change what we do not understand? https://www.wired.com/story/covid-immunity-antibodies/ "The human immune system is bafflingly complex. When scientists sequenced the human genome two decades ago, they skipped over detailing the immune system genes, because these bits of DNA are so variable and have a propensity to rearrange randomly during cell division. This ability, of course, is also what makes our immune system so amazing. According to the work of Dennis Burton, the Scripps researcher, and his collaborators, humans have the potential to generate 1,000,000,000,000,000,000 different kinds of antibodies, which means that we all, theoretically, possess the ability to neutralize a vast number of pathogens. The immune system is a randomizer, evolution’s way of preparing for uncertainty.