A peer-reviewed study has revealed that hantavirus genetic material can persist in human semen for nearly six years after initial infection, raising concerns about long-term sexual transmission risks. Scientists at Switzerland's Spiez Laboratory examined a 55-year-old man and found viral RNA in his semen for 71 months—almost six years—after he first contracted the virus. This suggests the male reproductive tract may act as a reservoir, enabling potential sexual transmission long after recovery.
Implications for Public Health
Hantavirus is typically spread through exposure to rodent droppings, urine, or saliva. It can cause hantavirus pulmonary syndrome, a severe respiratory illness with a fatality rate of up to 40%. The discovery of its long-term persistence in semen indicates that survivors may unknowingly pose a transmission risk to sexual partners. Experts are now urging the World Health Organisation (WHO) to revise its current guidelines, which recommend a 42-day quarantine for high-risk contacts. The new findings suggest that longer-term monitoring and precautions, such as consistent condom use, may be necessary.
Call for Updated WHO Guidance
In light of this research, public health specialists advocate for extended safe-sex advice for male hantavirus survivors, similar to protocols established for Ebola. The WHO currently advises a 42-day quarantine period for those exposed to high-risk contacts, but this new evidence implies that the virus may remain infectious in semen for years. The study authors emphasise that further research is needed to confirm whether the detected genetic material represents live virus capable of transmission, but the precautionary principle warrants immediate action.
The findings have significant implications for global health policy, particularly in regions where hantavirus is endemic. Enhanced surveillance and patient counselling could help mitigate secondary transmission risks. As the scientific community awaits further studies, the call for updated WHO guidance grows louder, aiming to protect both survivors and their partners.
