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Corticosteroid administration for viral pneumonia: COVID-19 and beyond
1Department of Respiratory and Critical Care Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China.
Corticosteroid use in viral pneumonia, including COVID-19, is controversial. While some studies show symptom improvement, evidence suggests increased mortality and delayed virus clearance, necessitating further research.
Area of Science:
- Virology
- Immunology
- Critical Care Medicine
Background:
- Corticosteroids are frequently used for acute respiratory distress syndrome due to anti-inflammatory properties.
- Their use in severe viral pneumonia, particularly pandemic strains, remains a subject of debate.
Purpose of the Study:
- To systematically review the efficacy and potential mechanisms of corticosteroid administration in pandemic viral pneumonia.
- To evaluate corticosteroid impact on influenza, SARS, MERS, and COVID-19.
Main Methods:
- Comprehensive literature search of PubMed, EMBASE, Web of Science, and Cochrane Library.
- Systematic summarization of effects and mechanisms of corticosteroid therapy.
Main Results:
- Observational data link corticosteroid use to increased mortality and infections in influenza, and delayed viral clearance in SARS and MERS.
- For COVID-19, while some studies report symptom and oxygenation improvement, the case fatality rate was higher in patients receiving corticosteroids (15.6%) compared to those who did not (4.3%).
- Severe COVID-19 patients were more likely to receive corticosteroids.
Conclusions:
- Current evidence does not support corticosteroid therapy for reducing COVID-19 mortality, despite reported symptomatic benefits.
- Excessive inflammation and lymphopenia are key factors in COVID-19 severity and mortality.
- High-quality randomized controlled trials are essential to confirm corticosteroid effectiveness and safety in pandemic viral pneumonia.
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