Co-infection of cytomegalovirus and Epstein–Barr virus-induced pneumonitis following hepatitis B reactivation in an esophageal cancer patient: A case report

This case highlights the importance of suspecting CMV and/or EBV pneumonitis in patients undergoing chemotherapy and no response to empiric antibiotics. Timely detection of causative pathogens is important, as prompt intervention can markedly improve patient outcomes.