The COVID Advisor

Long COVID continues to affect millions worldwide in 2025, with ongoing research shedding new light on its causes, symptoms, and potential treatments. This article summarizes the most recent scientific findings and clinical advances to help patients and healthcare providers better understand and manage this complex condition. Latest Research Insights on Long COVID Immune System Markers and Genetic Risk Factors A recent clinical study led by Cardiff Metropolitan University and Cwm Taf Morgannwg University Health Board identified elevated levels of the immune protein Interleukin-6 (IL-6) in people suffering from Long COVID compared to those who fully recovered 1 .  The study also found that individuals with a particular IL-6 receptor genotype, known as the ‘AA’ genotype, have an increased risk of developing Long COVID. These findings suggest IL-6 and its receptor could serve as biomarkers to predict risk and guide future treatments. Large-Scale Data from Electronic Health Records (EH...