The California duck farm's strain of H5N9 is different from those earlier cases because this time it is closely related to a newer variant of the H5N1 virus. That variant is called H5N1 D1.1, the USDA spokesperson said, which has emerged over the past year to dominate U.S. cases in wild birds and poultry.

Last week, commissioners in Manatee County voted to remove fluoride from the water supply. Humans working closely with dairy cows have also been infected. Irv Gotti, Music Executive Behind Ja Rule and Ashanti and Co-Founder of Murder Inc., Dies at 54