An update on the current bird flu outbreak: it’s still infecting wild birds, mammals and now several farmworkers in the United States. The virus does not appear to be transmitted between humans, but can we prevent further spread? And what are public health officials doing to contain it? Immunologist and virologist Rick Bright has been studying the bird flu for decades and tells Dr. Sanjay Gupta why he thinks more action is needed and who he thinks should be leading the charge.

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