H5N1 spreading in cities
Reports show highly pathogenic H5N1 is surging in New York’s urban wildlife and a red fox in Nome tested positive, signaling the virus is moving beyond farms into city ecosystems and wildlife—something organizers should watch for outdoor events and public fitness gatherings. ( ).
Bird flu is an influenza virus that usually rides along in wild ducks, geese, gulls, and shorebirds, the way a cold virus moves through a school without stopping at one classroom. In the United States, the strain now drawing attention is H5N1, a highly pathogenic form that can kill poultry and has also spread into mammals. (health.ny.gov) New York City says H5N1 has been circulating in the United States since 2022 and has already shown up in mammals including dairy cows and cats. The city also says pigeons and rats can carry bird flu viruses, but they usually do not get sick enough to pass the virus on to other animals or people. (nyc.gov) The shift scientists watch most closely is spillover, which is when a virus jumps from the animals it normally uses into a new host. Cornell’s wildlife lab says New York confirmed H5N1 in 39 wild mammals across eight species in 2025, including red foxes, raccoons, a striped skunk, a Virginia opossum, and a bobcat. (cornell.edu) That jump is easier in winter because bird migration packs more infected birds into the same places at the same time. New York’s Department of Environmental Conservation said in January 2026 that wild bird deaths from H5N1 rise in late fall and peak over the winter months. (dec.ny.gov) New York’s wildlife numbers have been climbing fast enough that Cornell reported H5N1 in nearly 290 birds across 35 species by its January 21, 2026 update. The lab said waterfowl and raptors were the most affected, and it was also getting more public reports of people interacting with sick wildlife. (cornell.edu) The city piece of this story is that infected birds do not stay on farms or marshes. New York City Health says once H5N1 is detected in a borough or county, extra testing usually stops there, which means a positive result is treated as evidence the virus is already established in that local wild-bird network. (nyc.gov) Now the same pattern is showing up far from New York. The Nome Nugget reported on April 9, 2026 that a red fox struck by a car west of Nome’s harbor tested positive for the H5N1 variant and negative for rabies, and Alaska officials said it was the first detection on the Seward Peninsula in six months. (nomenugget.net) Foxes matter here because they are scavengers, which means they pick up infection by eating sick or dead birds the way a vacuum picks up whatever is on the floor. Alaska biologists told the Nome paper that avian flu had been detected across the state all winter, and the state fish and game agency says red foxes are among the mammals already recorded with highly pathogenic avian influenza in Alaska. (nomenugget.net) (adfg.alaska.gov) For people, the current picture is still different from the picture in wildlife. The Centers for Disease Control and Prevention said on March 6, 2026 that there is no known person-to-person spread of A(H5) bird flu in the United States and that the current public health risk is low, even though sporadic human cases have occurred in people with animal exposures. (cdc.gov) The practical rule is simple and very specific: do not touch sick or dead birds or mammals. New York State tells the public to avoid contact with infected animals, and New York City says children and pets should be kept away from carcasses and people with direct exposure face the higher risk. (dec.ny.gov) (nyc.gov)
