AICDA and viral infectious disease: The APOBEC3B (Apolipoprotein B mRNA editing enzyme catalytic subunit 3B) belongs to a family of proteins called activation-induced cytidine deaminases (AICDA/AID), including APOBEC3A to APOBEC3G, which are encoded by an APOBEC genomic cluster on chromosome 22 and are known to protect human cells from viral infections by inducing mutations of single-stranded DNA [27].