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.