A Clinicoradiological Profile of H3N2 Outbreak in Western India

Abstract

Although H3N2 outbreaks were once rare, they have become more common in recent years. With a significant toll on health-care resources and the ability to cripple any society, the epidemiological significance of this disease is paramount. While most of the previous studies on influenza outbreaks have reported H1N1 disease, there is a scarcity of literature regarding the H3N2 clinicoradiological profile. Hereby, we present the clinicoradiological profile of a series of H3N2 cases from western India. This is a retrospective chart-based review of clinicoradiological profile of a series of cases that were reported to a tertiary care center in western India between February 2023 and March 2023. A total of 10 patients had tested positive for H3N2. All patients had a history of fever lasting an average of 4.7 days, and six had varying degrees of dyspnea. One patient had gastrointestinal symptoms, and six developed tachypnea with hypoxemia requiring oxygen supplementation. One patient with multiple comorbidities required invasive mechanical ventilation and had a complicated course with a superadded bacterial infection. Out of the four patients with radiographic findings, two had atypical pneumonia/acute infective etiology. This study provides valuable insights into the clinical presentation and management of H3N2 infections. The findings highlight the importance of influenza vaccination and early detection of H3N2 infections to prevent severe complications. The successful outcomes of the patients in this study demonstrate the effectiveness of prompt intervention and appropriate treatment in managing H3N2 infections.