For now, the H7N9 virus is still confined primarily to eastern China even if the number of H7N9 cases has rapidly increased to over 429 patients and may exceed those of the H5N1 virus infection.
Is bird flu a pandemic?
Flu viruses are constantly changing and animal flu viruses can change such that they may gain the ability to infect people easily and spread among people, causing a pandemic. Human infections with novel avian influenza virus like Asian H5N1 are concerning because of this pandemic potential.
WHO H7N9 human cases?
During the fifth epidemic, from October 1, 2016 through September 30, 2017, the World Health Organization (WHO) reported 766 human infections with Asian H7N9 virus , making it the largest H7N9 epidemic to date.
Is there a vaccine for H7N9?
Currently, there is no vaccine for H7N9 infection. Scientists have taken early steps to identify a strain of the virus that could be used to make a vaccine if it is needed. The seasonal flu vaccine will not protect against H7N9. Seasonal flu vaccines protect against seasonal influenza viruses.
What does H and N stand for in H7N9?
Influenza A viruses are divided into subtypes based on two proteins on the surface of the virus: hemagglutinin (H) and neuraminidase (N).
What year will COVID-19 end?
At-risk countries. Estimates of their overall immunity remain low enough that there is still a risk of significant waves of disease. Recent projections suggest that it is likely to take until late 2022 or early 2023 for these countries to achieve high vaccine coverage.
What happened to bird flu?
Human infections with bird flu viruses can happen when enough virus gets into a person’s eyes, nose or mouth, or is inhaled. This can happen when virus is in the air (in droplets or possibly dust) and a person breathes it in, or when a person touches something that has virus on it then touches their mouth, eyes or nose.
What is the Asian bird flu?
Bird flu, or avian influenza, is a viral infection spread from bird to bird. Currently, a particularly deadly strain of bird flu — H5N1 — continues to spread among poultry in Egypt and in certain parts of Asia. Technically, H5N1 is a highly pathogenic avian influenza (HPAI) virus. It’s deadly to most birds.
When was bird flu?
The virus was first detected in 1996 in geese in China and in humans in 1997 during a poultry outbreak in Hong Kong. Since then it has been detected in poultry and wild birds in more than 50 countries in Africa, Asia, Europe and the Middle East. According to the World Health Organisation H5N1 avian influenza occurs occasionally in humans.
