Clinical practice of respiratory virus diagnostics in critically ill patients with a suspected pneumonia: A prospective observational study

•Guidelines are unclear which ICU patients should be tested for respiratory viruses.•Less than half of ICU patients with CAP or HAP are tested for viral pathogens.•In ICU patients who were tested, the prevalence of viral infections is 16–34%.•There is room for increasing routine testing of influenza virus in CAP and HAP.