About Novel Influenza A Virus (H7N9)
"Novel” viruses like Novel Influenza A Virus (H7N9) have the potential to cause a pandemic if the virus were to change to become easily and sustainably spread from person-to-person. So far, person-to-person transmission of Novel Influenza A Virus (H7N9) has not been observed. However, influenza viruses constantly change and it’s possible that this virus could gain the ability to be transmitted person-to-person.
Novel H7N9 virus is an avian influenza virus. Human infections with avian influenza are rare but have occurred in the past, most commonly after exposure to infected poultry. This virus is very different from other H7N9 viruses previously found in birds.
The first human infections with Novel Influenza A Virus (H7N9) were reported by the Chinese National Health and Family Planning Commission to The World Health Organization (WHO) at the end of March, 2013. A few of the infected people in China have had mild illness, but most illness among identified cases has been severe.
CDC has made travel recommendations and recommendations for ill people with recent travel, but has not made special recommendations for people without travel history. CDC Travelers' Health
- For Health Professionals
Information specific to health care providers regarding specimen collection, submission, and surveillance for Novel influenza A including Novel Influenza A Virus (H7N9).
- Novel and Varient Influenza A viruses
More about highly pathogenic avian influenza A (H5N1, H7N3, and H7N9), and variant influenza A (H3N2v and H1N2v).