Nikhil Prasad Fact checked by:Thailand Medical News Team May 01, 2026 1 hour, 25 minutes ago
Medical News: A major new scientific review is shedding fresh light on Long COVID, revealing why the condition has remained so difficult to understand, diagnose, and treat. The findings suggest that Long COVID is not a single illness but a complex condition driven by multiple biological disruptions happening simultaneously inside the body.
New research reveals how immune disruption, lingering virus, and vascular damage may drive persistent
Long COVID symptoms
The research was conducted by an international team of scientists from institutions including Loughborough University in the United Kingdom, Vrije Universiteit Amsterdam in the Netherlands, Imperial College London, University College London, Karolinska Institutet in Sweden, Weill Cornell Medicine and the Icahn School of Medicine at Mount Sinai in the United States, Stellenbosch University in South Africa, and several other global research centers.
A Global Health Crisis Still Unfolding
Long COVID continues to affect millions of people worldwide, with estimates suggesting that hundreds of millions may be living with persistent symptoms. These symptoms can appear even after mild infections and may last for months or years, severely impacting daily life and the ability to work.
Patients commonly report extreme fatigue, breathing difficulties, memory issues, poor sleep, and heart-related symptoms. In many cases, these symptoms come and go, making the condition even harder to manage.
A Multi-System Disorder
Scientists now believe that Long COVID is caused by a combination of overlapping problems rather than a single trigger. These include ongoing immune system disruption, damage to blood vessels, problems with the nervous system, and the possible persistence of viral fragments in the body.
This
Medical News report highlights that these factors do not occur in isolation but interact with one another, creating a cascade of effects that can impact multiple organs at once.
Immune System Stuck in Overdrive
One of the most important discoveries is that the immune system may remain activated long after the initial infection has passed. Instead of returning to normal, it continues to release inflammatory signals that can damage tissues and cause ongoing symptoms.
In some cases, the immune system may even begin to attack the body’s own cells, a process known as autoimmunity. This may explain why Long COVID shares similarities with other chronic illnesses triggered by infections.
Lingering Virus May Play a Role
Researchers have also found evidence suggesting that fragments of the virus may remain in the body for extended periods. These remnants may continue to stimulate the immune system, keeping inflammation active.
Additionally, other dormant viruses already present in the body may become reactivated, adding another layer of complexity to the condition.
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Blood Vessel Damage and Microclots
Another key finding is the presence of abnormalities in blood vessels. Damage to the lining of these vessels can lead to poor circulation and the formation of tiny clots that interfere with oxygen delivery.
This may help explain symptoms such as fatigue, muscle weakness, and cognitive problems, as tissues are not receiving the oxygen and nutrients they need to function properly.
Brain Fog and Nervous System Disruption
Many patients experience what is commonly referred to as “brain fog,” along with dizziness, heart rate irregularities, and difficulty regulating body functions. These symptoms are believed to be linked to dysfunction in the autonomic nervous system, which controls essential processes like heart rate and blood pressure. Inflammation affecting the brain may also contribute to memory issues and difficulty concentrating.
Why Treatment Is Still Limited
Despite growing understanding, there are still no proven treatments that can cure Long COVID. Current approaches focus mainly on managing symptoms, as the underlying causes vary from person to person.
Researchers emphasize the urgent need for better diagnostic tools and personalized treatment strategies that target specific biological pathways involved in the condition.
Conclusion
Long COVID is emerging as a complex, multi-system disorder that challenges traditional approaches to diagnosis and treatment. The latest findings confirm that it is driven by a combination of immune dysfunction, persistent viral activity, vascular damage, and nervous system disruption. These interconnected processes explain why symptoms can vary widely and persist for long periods. While significant progress has been made in understanding the condition, much remains unknown. Continued global research efforts will be essential to uncover precise mechanisms, develop targeted therapies, and ultimately improve the quality of life for millions affected by this long-term condition.
The study findings were published in the peer reviewed journal: Communications Medicine.
https://www.nature.com/articles/s43856-025-01300-z
For the latest on Long COVID, keep on logging to Thailand
Medical News.
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https://www.thailandmedical.news/articles/long-covid
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