Summary of the best evidence for early pulmonary rehabilitation in patients with severe pneumonia

Based on the evidence-based "6S" pyramid evidence model, this study searched the relevant literature from top to bottom, and the search time limit was the database construction until March 2024. Clinical decision support systems are Up To Date and BMJ Best Practice; The domestic and foreign guide websites are the National Guide Network （NGC ）,the International Guide Collaboration (GIN), the JBI Evidence-based Health Care Center database, the National Institute for Health and Clinical Excellence (NICE),the Chinese Medical Assocation; Respiratory-related professional assocation (ATS), and the British Chest Assocation (BTS); The databases are PubMed, Embase, Web of Science, CINAHL , CNKI, China Biomedical Network, Wanfang, VIP, etc.