These small rodents are a key part of the Northwest Arctic ecosystem.

Voles breed like crazy. They can have three or four litters of six to eight kits each summer. Babies are born hairless, but are weaned and on their own in less than three weeks. Females are ready to breed at 30 days.

Increase in red voles and gray shrews, compared to the last three years.

For nine years, Alaska health officials have been aware of an unusual virus causing rare, relatively mild illnesses in the Fairbanks area. But a recent case in another part of the state — this one resulting in a man's death — has brought new attention to the Alaskapox virus.