US reports first outbreak of deadly H7N9 bird flu since 2017
H7N9 has high death rate for humans, killing 616 people of 1,568 people infected worldwide since first detected in 2013 in China, WHO said.
H7N9 has high death rate for humans, killing 616 people of 1,568 people infected worldwide since first detected in 2013 in China, WHO said.
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