What are the symptoms of H7N9?
The first sign of human infection with H7N9 is a high fever and a cough . The virus causes serious respiratory symptoms, including severe pneumonia….Symptoms
- fever.
- cough that produces sputum.
- breathing problems and wheezing.
- headache.
- myalgia, or muscle pain.
- general malaise.
What was the fatality rate of H7N9?
In contrast, H7N9 has a lower-case fatality rate of 40%, in which two thirds of deaths are over the age of 50, but even so this is still significantly higher than seasonal and even Spanish influenza. Incubation period: 1-4 days for seasonal influenza and 2-5 days for avian influenza.
What type of virus is H7N9?
Avian influenza A(H7N9) is a subtype of influenza viruses that have been detected in birds in the past. This particular A(H7N9) virus had not previously been seen in either animals or people until it was found in March 2013 in China.
WHO H7N9 human cases?
Since October 1, 2017, there have been only 3 reported human infections. 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.
Can H5N1 cause a pandemic?
The first outbreak of human infection by avian influenza viruses (H5N1) was observed in 1997 in Hong Kong. Since then a large number of outbreaks have been reported in different parts of the world. In fact, the spread of avian influenza H5N1 in various species including humans has lead to a current pandemic threat.
What virus was in 2007?
The Pandemic Threat: H5N1 Virus in 2006–2007 H5N1 virus was associated with the deaths of >230 million birds during that time. Human infection due to the H5N1 virus has been reported in 12 countries, resulting in 330 known cases and an associated mortality rate of ∼60% as of 8 October 2007 (table 1) [3].
What does H7N9 stand for?
Human infections with an Asian lineage avian influenza A(H7N9) virus (“Asian H7N9”) were first reported in China in March 2013.
How many people have been infected with H7N9 so far?
Since October 1, 2017, there have been only 3 reported human infections. , making it the largest H7N9 epidemic to date. As of December 7, 2017, the total cumulative number of human infections with Asian lineage H7N9 reported by WHO since 2013 is 1565.
What do we know about the Asian H7N9 virus?
Asian H7N9 viruses continue to circulate in poultry in China. Most reported patients with H7N9 virus infection have had severe respiratory illness (e.g., pneumonia). Rare instances of limited person-to-person spread of this virus have been identified in China, but there is no evidence of sustained person-to-person spread.
Is H7N9 a bird flu?
H7N9 is considered a bird flu, but it has affected some humans. This can be dangerous, because humans have no immunity to bird flu. H7N9 is an avian, or bird, flu virus. The virus normally affects poultry birds, but it has mutated so that it can affect humans too.
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