The mRNA is the instruction that the body follows to produce the viral proteins that lead to an immune response. If the mRNA in a batch of vaccine degrades mor

The mRNA is the instruction that the body follows to produce the viral proteins that lead to an immune response. If the mRNA in a batch of vaccine degrades more than they have allowed for in the treatment protocol, it may not work. (This is one of the reasons they have very specific handling rules and throw out vaccine that is improperly handled)