Importantly, the pathogenesis of IPA differs between neutropenic and non-neutropenic patients, including those with COVID-19, impacting clinical presentation, radiological findings and diagnostic test results in the mycology laboratory [41,42]. Despite these important differences, revised European Organization for Research and Treatment of Cancer/Invasive Fungal Infections Cooperative Group and National Institute of Allergy and Infectious Diseases Mycoses Study Group (EORTC/MSG) definitions [43] focus primarily on neutropenic patients with underlying hematological malignancies and “typical” presentation of IPA and have been shown to have limited applicability and inferior performance in non-neutropenic patients who frequently do not fulfil radiological and host criteria, including patients with COVID-19 [41,44]. This has resulted in the creation of an alternative clinical algorithm for diagnosing IPA in the ICU setting in 2012 [41], which defines putative IPA and is now the standard of care for defining IPA in the ICU [4,45], where highly reliable definitions of IA are still missing (work on improved definitions is currently in progress [45,46]).