Long COVID-19 and other chronic respiratory conditions after viral infections may stem from an overactive immune response in the lungs

Viruses that cause respiratory diseases like the flu and COVID-19 can lead to mild to severe symptoms within the first few weeks of infection. These symptoms typically resolve within a few more weeks, sometimes with the help of treatment if severe. However, some people go on to experience persistent symptoms that last several months to years. Why and how respiratory diseases can develop into chronic conditions like long COVID-19 are still unclear.

I am a doctoral student working in the Sun Lab at the University of Virginia. We study how the immune system sometimes goes awry after fighting off viral infections. We also develop ways to target the immune system to prevent further complications without weakening its ability to protect against future infections. Our recently published review of the research in this area found that it is becoming clearer that it might not be an active viral infection causing long COVID-19 and similar conditions, but an overactive immune system.

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