In another study by Kormann and colleagues, translation was maximized and innate immune response was reduced in a mouse lung disease model by introducing chemically-modified nucleotides during in vitro transcription of mRNA (IVT-mRNA), coding for surfactant protein B (SP-B) with a 25% replacement of cytidine and uridine by modified 5-methyl cytidine (5-methyl CTP) and 2-thio uridine (2-thio UTP), respectively19. Here, SFTPB is linked to lung disorder.