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Did You Know
Special> Tracking H7N9 Bird Flu> Did You Know
UPDATED: April 17, 2013 Web Exclusive
Frequently Asked Questions about H7N9
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What is H7N9?

Influenza A H7 viruses are a group of influenza viruses that normally circulate among birds. The H7N9 virus is one subgroup among the larger group of H7 viruses. Although some H7 viruses (H7N2, H7N3 and H7N7) have occasionally been found to infect humans, no human infections with H7N9 viruses have been reported until recent reports from China.

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