Since the beginning of this year, cases of human infection with H7N9 bird flu have been reported in 16 provinces in China, which has increased significantly compared with the same period of last year. According to data released by the National Health and Family Planning Commission, 192 cases of H7N9 bird flu were reported in China in January and 79 people died. The epidemic (September 2016 up to now) has been characterized by an earlier start, a large increase in the number of infected people, and a high degree of infection in poultry.
At the same time, many rumors are circulating on the Internet. “Hao Aijun, Gaofeng Town, Ruichang City, Jiangxi Province, died of infection with H7N9 bird flu in a large chicken in the Wushi Street Hotel. Hu Haibing, the doctor involved in the rescue, has been isolated. 5,570 poultry have been infected in Ruichang City. After the Spring Festival this year, The above information appeared in Ruichang, Jiangxi, and was widely disseminated. At present, the local government has already refuted this.
As such, rumours that the bottom plate is being processed by "the death of bird flu from bird flu in large pan chickens" have appeared in many places such as Ruichang, Jiangxi, Dezhou, Shandong, and Inner Mongolia. In addition, "pickling pickled chicken legs" and other sarcophagi are also used to make false news.
What is the real situation? According to the authoritative information released by the National Health and Family Planning Commission, the most important risk factor causing human infection with the H7N9 virus is an environment that is directly or indirectly exposed to infected live poultry or infected poultry. At present, most cases of H7N9 cases diagnosed in China are exposed or exposed to live poultry before the onset of disease, and the proportion of H7N9 exposed to live poultry markets is mostly high.
It is worth noting that there is no evidence that the H7N9 virus can be transmitted to humans through properly handled poultry or poultry eggs. In addition, eating cooked food will not be infected with the H7N9 virus.
â– Doubts
Can bird flu be passed down?
Experts claim that they are still avian-originated and have not been able to pass humans effectively
Does H7N9 bird flu have interpersonal communication capabilities? For many years, this was one of the issues that the public was concerned about when the epidemic spread.
According to the National Health and Family Planning Commission, the monitoring showed that although there were occasional cases of localized clustering (each case of 2-3 cases, there was no case of recurrence), there was no evidence that the H7N9 virus could continue to be “human-to-humanâ€.
In addition, the WHO Representative Office in China also stated that there has been a recent outbreak of H7N9 flu in China. However, there is no evidence that the H7N9 flu virus has sustained interpersonal communication capabilities.
According to Ni Daxin, deputy director of the China Center for Disease Control and Health Emergency Response Center, H7N9 influenza virus is a type of influenza A virus. One of the important features of influenza A virus is that it is relatively prone to mutation. Therefore, it is always possible to closely monitor the possible changes of the H7N9 virus. One of the most important aspects of the job control is that once the H7N9 virus has acquired the ability to easily spread from person to person, it may become the new flu pandemic.
He said that the results of H7N9 virus detection in this epidemic show that the virus has not undergone important mutations, and is still avian-originated virus, and it has no effective human-to-human transmission capability. The virus is commonly used for antiviral drugs such as Tamiflu. It is also sensitive.
â– Related News
Two virus mutations in Guangdong have no effect on humans
The CDC announced on the 19th that two variants of the H7N9 virus were found in Guangdong Province. The virus has been mutated to a highly pathogenic virus in poultry, and mutations in human infectivity, virulence, and interpersonal transmission have not yet emerged.
It is reported that two cases had a history of bird exposure before the onset of the disease, and poultry mortality occurred successively in the exposed poultry population. At present, one case has been cured and another case is still being treated. All 105 close contacts of the two cases showed no symptoms of fever, cough, etc. after two weeks of medical observation.
According to China Disease Control, some mutations in the H7N9 virus may lead to increased infection, virulence, and interpersonal transmission of the virus. As a result, the virus mutation problem has attracted widespread attention at home and abroad.
In addition, laboratories in the agricultural sector also found similar mutations in 4 poultry specimens in Guangdong. The Health and Family Planning System will work with the agricultural sector to study the source and scope of the mutated virus, and continue to strengthen the monitoring of the H7N9 virus to detect any possible variations in time.
In this regard, Wang Danhang, deputy director of the Infectious Diseases Department of the Ditan Hospital and a viral infectious disease expert, said that influenza virus mutations have always occurred. Influenza vaccines need to be fought year after year because of the large or small variations in influenza viruses occurring in real time. "The mutation is nature, the key is to look at the clinical significance of the mutation site."
The director of the National Center for Disease Control and Prevention, National Center for Influenza Virus Zhang Yuelong, said that the H7N9 virus mutation had no effect on humans. The previous treatments and drugs were still applicable. "After the bird had been infected with the H7N9 virus, it did not generally appear to have been morbid or dead. However, this variant of the H7N9 virus caused the death of the bird. Therefore, it is speculated that the mutant virus has a greater impact on agriculture."
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