Unveiling the Origins of Long Covid: Promising Insights from a Blood Test

Scientists have discovered clear differences in the blood of people with long Covid, providing evidence that the condition is a biological illness. The findings offer insights into the potential causes of long Covid, including irregular immune system cell activity and significantly lower levels of the hormone cortisol. The study also revealed that dormant viruses, such as Epstein-Barr, become active again in long Covid patients. However, it remains unclear whether these viruses are causing symptoms or indicating immune system issues. The research highlights the need for further investigation into the signals and mechanisms driving long Covid.