CIAO3 and pertussis: The individually coded pertussis mRNA included in the 10-antigen multivalent mRNA vaccine is pertussis toxoid subunit 1 (PTxA-C180), PRN, filamentous hemagglutinin (FHA), fimbria serotype 2 and 3 (FIM 2/3), Bordetella resistant to killing gene A (BrkA), repeats-in-toxin domain (RTX) of adenylate cyclase toxin, a subtilisin-like serine protease autotransporter (SphB1), and tracheal cytotoxin factor A (TCFA; Fig. 2b).