In addition to RTT, patients can also exhibit duplication or triplication of the MECP2 gene, resulting in MECP2 duplication syndrome (MDS), a disorder characterized by numerous abnormal symptoms such as hypotonia, seizures, intellectual disability, and recurrent infections (Ramocki, Peters et al. 2009, Ramocki, Tavyev et al. 2010, Collins and Neul 2022). This evidence concerns the gene MECP2 and infection.