WASHINGTON: A child in California has become the first in the United States to test positive for bird flu infection, authorities said on Friday (Nov 22), as health officials offered checks and preventive treatment to exposed contacts at the child's day care centre. The child, from Alameda County in the San Francisco Bay area, had mild symptoms and was said to be recovering at home following treatment with flu antivirals, according to the US Centers for Disease Control and Prevention (CDC) and