The Impact of Thrombocytopenia and Lymphopenia on Mortality in Patients Infected with Influenza Virus: A Retrospective Cohort Study.

Introduction: Influenza virus causes significant global annual morbidity and mortality. Thrombocytopenia is recognized as a poor prognostic factor in sepsis and is associated with mortality, while lymphopenia has been established as a poor prognostic factor in other viral infections. We aimed to assess the incidence of thrombocytopenia and lymphopenia in seasonal influenza and their effect on clinical outcomes.