Bird flu, at this point, is somewhat of a misnomer. The virus, which primarily infects birds, is circulating uncontrolled around much of the world, devastating not just birds but wide swaths of the animal kingdom. Foxes, bobcats, and pigs have fallen ill. Grizzly bears have gone blind. Sea creatures, including seals and sea lions, have died in great numbers.
But none of the sickened animals has raised as much concern as mink. In October, a bird-flu outbreak erupted at a Spanish mink farm, killing thousands of the animals before the rest were culled. It later became clear that the virus had spread between the animals, picking up a mutation that helped it thrive in mammals. It was likely the first time that mammal-to-mammal spread drove a huge outbreak of bird flu. Because mink are known to spread certain viruses to humans, the fear was that the disease could jump from mink to people. No humans got sick from the outbreak in Spain, but other infections have spread from mink to humans before: In 2020, COVID outbreaks on Danish mink farms led to new mink-related variants that spread to a small number of humans.
As mammals ourselves, we have good reason to be concerned. Outbreaks on crowded mink farms are an ideal scenario for bird flu to mutate. If, in doing so, it picks up the ability to spread between humans, it could potentially start another global pandemic. “There are many reasons to be concerned about mink,” Tom Peacock, a flu researcher at Imperial College London, told me. Right now, mink are a problem we can’t afford to ignore.
For two animals with very different body types, mink and humans have some unusual similarities. Research suggests that we share similar receptors for COVID, bird flu, and human flu, through which these viruses can gain entry into our bodies. The numerous COVID outbreaks on mink farms during the early pandemic, and the bird-flu outbreak in Spain, gravely illustrate this point. It’s “not surprising” that mink can get these…
Read the full article here
