CDC says no ‘clear source’ of bird flu infection in Missouri patient – NBC News

CDC says no ‘clear source’ of bird flu infection in Missouri patient  NBC NewsBird flu case still stumping officials. How did Missouri person get infected?  USA TODAYNo clear exposure source in Missouri H5 avian flu case  University of Minnesota Twin CitiesFirst case of human bird flu diagnosed without exposure to infected animals, CDC says  Fox NewsBird Flu Is Quietly Getting Scarier  The Atlantic