As the U.S. flu season winds down, health officials say the flu vaccine didn’t work very well. It had one of its worst effectiveness rates in more than a decade.
An avian flu outbreak at California's Año Nuevo State Park is spreading across the Central Coast, infecting elephant seals, a sea otter and a sea lion.
The H5N1 bird flu outbreak in California elephant seals has spread to other marine mammals, including a sea otter and sea lion. But wildlife officials are hopeful the outbreak will remain contained.