US CDC confirms H5N1 bird flu in a child in California

California's public health department had reported the case on Tuesday, but said there was no evidence of human-to-human transmission of the virus. The CDC affirmed that currently there was no evidence of person-to-person spread of H5N1 bird flu from this child to others, but said it will continue contact tracing. A follow-up test of the child several days later was negative for bird flu but was positive for other common respiratory viruses, it added.