Related Experiment Video
Updated: May 6, 2026

Modeling Dysplastic and Functional Lung Alveolar Repair after Influenza Infection
Published on: September 19, 2025
Influenza A(H1N1)pdm09 virus and asthma
Masatsugu Obuchi1, Yuichi Adachi, Takenori Takizawa
1Department of Virology, Toyama Institute of Health Toyama, Japan.
Abstract:
Respiratory viral infection is a major cause of asthma exacerbations in both children and adults. Among the respiratory viruses, influenza virus is a particularly important pathogen due to its enormous morbidity and mortality in annual epidemics. The swine-origin influenza A virus, designated as A(H1N1)pdm09, emerged in the spring of 2009 and caused the first influenza pandemic in the 21st century. With the emergence of the novel A(H1N1)pdm09 virus, numerous epidemiologic studies detected asthma as a frequent comorbid condition in patients infected with this virus. Here we review recent reports regarding asthma in patients infected with influenza A(H1N1)pdm09 virus, and we discuss the utility of influenza vaccines and antivirals.
Related Concept Videos
Asthma I: Introduction
Influenza
Asthma-I: Introduction
Asthma-III: Symptoms and Complications
Classification of Asthma
Asthma III: Clinical Manifestations
Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.

