Invasive aspergillosis after influenza and other viral respiratory infections among intensive care unit patients in a commercially-insured population in the United States, 2013–2018

Influenza-associated aspergillosis (IAA) is an emerging phenomenon in intensive care unit patients with severe influenza. In a large US health insurance claims database, IAA was uncommon (0.3%) during 2013-2018. The low IAA frequency likely reflects underdiagnosis and differences in medical practices or epidemiologic differences.