Giant Study Reveals Why Some Viruses Hide Inside Your Body For Life
ScienceAlert • • health
Key Points:
- A Harvard Medical School-led study analyzed blood and saliva samples from over 917,000 people to examine viral DNA loads in healthy individuals, revealing how common viruses persist in the body without causing disease.
- The research identified 82 human genome loci, particularly in the Major Histocompatibility Complex, associated with viral load, linking genetic factors and demographics like age and sex to the body's ability to suppress viruses.
- Epstein-Barr virus (EBV) viral load was found to increase with age and seasonally, and a high EBV load was directly linked to a higher risk of Hodgkin's lymphoma, though no similar link was found for multiple sclerosis, suggesting immune response differences.
- Non-genetic factors such as age, sex, and smoking status also influenced viral DNA load, with most viruses being more prevalent in men, and anelloviruses were found in 80-90% of the population despite unclear disease associations.
- The study focused on DNA viruses, highlighting the need for further research on RNA viruses and the impact of ancient viral DNA integrated into human genomes on health.
