Federal and state health officials said they have confirmed a third human case of bird flu in California and identified an additional two new possible cases.  The case was identified in a Central

Washington state health officials said four agricultural workers tested presumptively positive for avian influenza, marking the first presumed human cases in the state.

Health officials are investigating the first presumed human cases of bird flu in Washington state after four agricultural workers tested positive for H5N1 last week. Why it matters: These are Washington's first presumed human cases of avian flu,