They're still in the test phase of mRNA vaccines.
Studies that have been made on mRNA measles vaccine. About 1/3 of the test subjects had epitope(antibodies bind), also known as antigenic determinant or pathogenic priming. Another 1/3 they where not sure if they had epitope or not. Found here
Mapping of topoisomerase II α epitopes recognized by autoantibodies in idiopathic pulmonary fibrosis
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1905127/ Similar report focused on covid
Immunization with SARS coronavirus vaccines leads to pulmonary immunopathology on challenge with the SARS virus
https://pubmed.ncbi.nlm.nih.gov/22536382/ This is for reference on Type II topoisomerase. DNA-binding core that contains a winged helix domain (WHD), often referred to as a CAP domain, since it was first identified to resemble the WHD of catabolite activator protein (which seems to be the trigger for the cytokine storm)
https://infogalactic.com/info/Type_II_topoisomerase#Structure_of_type_IIA_topoisomerases For reference on epitope or pathogenic priming. antigen to which an antibodies bind. Once they bind they can't function.
https://infogalactic.com/info/Epitope