infectious causes of neutropenia
Postinfectious neutropenia is most commonly seen in children after viral infections. It can be caused by almost any viral infection, though it is most commonly seen after varicella, measles, rubella, influenza, hepatitis, Epstein-Barr virus, or HIV infection. Although most are self-limited, neutropenia after Epstein-Barr virus and HIV infection can sometimes be prolonged.