125 unknown viruses discovered in China: a new threat to humans?

The discovery is troubling. Unidentified viruses may be lurking in Chinese fur farms. A recent study has reignited the controversy surrounding this contentious industry.

Nearly 125 viruses have been identified among mink, muskrats, and raccoon dogs. Some pose a significant risk to humans, according to the researchers.


Scientists sequenced the genetic material of 461 animals that died of disease between 2021 and 2024. Most of these animals came from fur farms. Their analyses revealed 36 new viruses that were previously unknown. The potential for cross-species transmission of 39 of these viruses is of major concern, as the close proximity of animals and humans in the farms facilitates such transmissions, putting workers and nearby populations at risk.

Edward Holmes, a virologist at the University of Sydney, warned specifically about a bat coronavirus of the HKU5 type, detected in mink. This virus is a close relative of MERS, which is dangerous to humans. According to the researchers, the conditions in these farms promote the spread of viruses, raising fears of another pandemic.

Some nations like Denmark took action by culling their farmed mink in 2020. However, China, the world's largest producer, continues this activity despite the public health warnings. Experts are calling for increased surveillance of fur farms, particularly targeting high-risk species like mink and raccoon dogs.

Enhanced monitoring could help prevent future outbreaks. The study has reopened the debate on the connection between fur farming and the emergence of new infectious diseases. The threat of a new pandemic is prompting considerations for stricter regulations.

What is an HKU5 coronavirus?

The HKU5 coronavirus is a virus from the coronavirus family. It was initially discovered in bats, animals that frequently serve as natural reservoirs for several coronaviruses. HKU5 is related to MERS (Middle East Respiratory Syndrome), a viral illness that can be fatal to humans.

Until recently, this virus had not been detected in other species. However, recent studies have shown its presence in farm-raised mink. This discovery is alarming because it suggests that HKU5 has crossed the species barrier, jumping from bats to mink.

Scientists are concerned that this virus could eventually be transmitted to humans. If this occurs, it may cause severe illnesses similar to MERS, underlining the importance of rigorous monitoring of fur farms where such viruses might spread.