Search Strategy and Information Sources
The search strategy was carried out in the databases PubMed, Embase, Ovid and Cochrane Library, Web Of Science, ScienceDirect Journals (Elsevier), Scopus (Elsevier), OneFile (Gale) followed the following steps: - search by MeSH Terms: COVID -19. SARS-CoV-2. Severe Acute Respiratory Syndrome. Acute Respiratory Distress Syndrome. Prevention , and use of “and” Booleans between mesh terms and “or” among historical findings.