Journal
CLINICAL MICROBIOLOGY REVIEWS
Volume 34, Issue 3, Pages -Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/CMR.00103-20
Keywords
COVID-19; SARS-CoV-2; respiratory tract; viral infections
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Respiratory viruses can lead to a range of clinical manifestations, and the delicate balance between protective and dysregulated immune responses is crucial. Understanding the mechanisms of viral damage is key to developing new immune-based antiviral strategies.
Several viruses target the human respiratory tract, causing different clinical manifestations spanning from mild upper airway involvement to life-threatening acute respiratory distress syndrome (ARDS). As dramatically evident in the ongoing SARS-CoV-2 pandemic, the clinical picture is not always easily predictable due to the combined effect of direct viral and indirect patient-specific immune-mediated damage. In this review, we discuss the main RNA (orthomyxoviruses, paramyxoviruses, and coronaviruses) and DNA (adenoviruses, herpesviruses, and bocaviruses) viruses with respiratory tropism and their mechanisms of direct and indirect cell damage. We analyze the thin line existing between a protective immune response, capable of limiting viral replication, and an unbalanced, dysregulated immune activation often leading to the most severe complication. Our comprehension of the molecular mechanisms involved is increasing and this should pave the way for the development and clinical use of new tailored immune-based antiviral strategies.
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