For ABL inhibitors, including imatinib, dasatinib, nilotinib, basutinib, and ponatinib, there is a modest increased risk of overall infection, with a risk of invasive fungal infection, tuberculosis, and cytomegalovirus (especially with dasatinib, particularly after hematopoietic stem cell transplantation), and a risk of hepatitis B virus reactivation (155). For the BTK/EGFR inhibitor, ibrutinib, there is a modest increased risk of overall infection, with a risk of pneumocystis jirovecil pneumonia, invasive fungal infection, and progressive multifocal leukoencephalopathy, and a risk of hepatitis B virus reactivation (155). For JAK inhibitors, including ruxolitinib, tofacitinib, baricitinib, there is a major increased risk of overall infection, with a risk of pneumocystis jirovecil pneumonia, herpes zoster, tuberculosis, cytomegalovirus, Epstein-Barr virus, and progressive multifocal leukoencephalopathy, as well as a risk of hepatitis B virus reactivation (155).