Multiplex PCR for Severe Respiratory Infections During the COVID-19 Pandemic

The hypothesis was that a retrospective investigation of the molecular virological tests in a University hospital could be informative, with the aim to identify non-COVID-19 respiratory viruses during the circulation of SARS-CoV-2, according to systematic population data for public health knowledge: * the main goal was to perform a retrospective investigation of the molecular virological tests in a University hospital, in order to identify non-COVID-19 respiratory viruses from the beginning of 2021 to mid-2022 during the circulation of SARS-CoV-2, for public health knowledge; * the secondary aim was to retrospectively analyze, for a small subgroup of patients from an intensive care unit, the files of patients with positive molecular virological tests for non-COVID-19 respiratory viruses from the beginning of 2021 to mid-2022, reporting the following standard-of-care data: (i) the identification of the viruses, (ii) bioclinical features, (iii) medical impact of virological results in real life.