U.S. cases of bird flu have been relatively mild and limited to farm workers who handled sick animals – a sign the virus may not be well suited to infecting humans in its current state. U.S. cases of bird flu have been relatively mild and limited to farm workers who handled sick animals – a sign the virus may not be well suited to infecting humans in its current state. NBC News Science
What the 9 human cases of bird flu in the U.S. so far tell us about the disease
