Health officials in California are investigating a suspected case of avian flu involving a child in Alameda County who is exhibiting mild symptoms. The California health department has reported that the child tested positive for the H5N1 strain of the virus, although no concerns of human-to-human transmission have been detected. This case stands out due to the current low risk of widespread infection, and health officials are emphasizing that there is no outbreak concern. The investigation continues as authorities seek to determine the source of the infection.