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Coronavirus disease 2019 (COVID‐19), triggered by the betacoronavirus SARS‐CoV‐2, has become one of the worst pandemics of our time that has already caused more than 250,000 deaths (JHU data‐05/06/2020, https://coronavirus.jhu.edu/). Effective therapeutic approaches are urgently needed to reduce the spread of the virus and its death toll. Here, we assess the possibility of using interferon‐lambda (IFNλ), a third type of interferon sharing low homology with type I IFNs and IL‐10, for treating COVID‐19 patients. We discuss the unique role of IFNλ in fine‐tuning antiviral immunity in the respiratory tract to achieve optimal protection and minimal host damage and review early evidence that SARS‐CoV‐2 may impair IFNλ induction, leading to a delayed type I IFN‐dominated response that triggers hyperinflammation and severe disease. We also consider the potential windows of opportunity for therapeutic intervention with IFNλ and potential safety considerations. We conclude that IFNλ constitutes a promising therapeutic agent for reducing viral presence and hyperinflammation in a single shot to prevent the devastating consequences of COVID‐19 such as pneumonia and acute respiratory distress syndrome (ARDS).
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document_parses/pdf_json/4c2599ce48327df8ab4f2be48d253dba9b213061.json; document_parses/pdf_json/983b812d02ed721ccdee73215b1067c8c959f1a9.json
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document_parses/pmc_json/PMC7267110.xml.json
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COVID‐19: lambda interferon against viral load and hyperinflammation
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