Tiny Genetic Change Lets Bird Flu Leap to Humans

At least six provinces have reported human cases of H7N9 influenza this year, according to Chinese state media - Getty Images

CLICK HERE - STUDY - Nature Communications - An NS-segment exonic splicing enhancer regulates influenza A virus replication in mammalian cells

bbc.com - March 21, 2017

A change in just a single genetic "letter" of the flu virus allows bird flu to pass to humans, according to scientists.

Monitoring birds for viruses that carry the change could provide early warning of risk to people, they say . . .

 . . . The change in a single nucleotide (a building block of RNA) allows the H7N9 virus to infect human cells as well as birds, say Prof Honglin Chen and colleagues.

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