https://alexberenson.substack.com/p/flu-is-out-of-control-in-the-united
"
mRNA is a thread of four types of "nucleotides," simple carbon-based molecules linked in a long chain. But the mRNA in Covid shots contains a slightly different kind of nucleotide, one that tamps down our immune systems and makes them less likely to recognize the vaccine as a foreign body and attack it...."