A child in Alameda County, California, has tested positive for the H5N1 bird flu, marking the first such case in the United States. The child displayed mild symptoms and received antiviral treatment without hospitalization. Health officials confirmed that the viral load was low and the child was likely not infectious. All family members tested negative, and local authorities recommended testing for staff and other children at the daycare. Concerns about transmission are downplayed by health officials, citing no evidence of human-to-human transmission in over 15 years.