How harmful is avian influenza to humans?

Stor, the chief influenza expert of the World Health Organization, revealed on the 24th that under the coordination of the organization, scientists from various countries will conduct a series of experiments to study how dangerous the avian influenza virus currently endangering Asian poultry may bring to human health.

In an exclusive interview with the Associated Press, Storr said a laboratory in Rotterdam, the Netherlands, had planned to experiment with monkeys using purebred avian influenza viruses and was expected to have results by the end of March. Similar experiments are expected to provide clues to the study of how avian influenza viruses might behave in humans. Scientists hope that the monkey experiment will help with some of the following questions:

How long the virus is incubated in the human body, how long the person is contagious, when antibodies can be detected, when the fever starts and when the fever starts to subside, how likely is it to survive, and whether the virus is transmitted through feces and saliva, etc.

The experiments in the Netherlands will also include autopsies on monkeys infected with avian influenza viruses, which has the potential to provide important information for avian influenza control. It is unclear whether the bird flu virus will only infect people's lungs or spread to various parts of the body, Storr said. Of the two new anti-influenza drugs available, Lorenze is only effective in the lungs, while Tamiflu can act on many tissues, and if the avian influenza virus can enter the brain, liver and other parts of the body, it will mean that Tamiflu can only be used**.

The spread of the H5N1 avian influenza virus in Asia is still relatively rare, but many experts believe that the threat to humans cannot be ignored. Avian influenza viruses have the potential to pose a serious threat to human health in two ways. One is that it has become easily transmitted from person to person through its own genetic mutation, and H5N1 has not shown such signs so far.

Another way is for avian influenza viruses to bind to human influenza viruses in the human body and exchange genes with each other to form new hybrid viruses that can easily spread from person to person.

Researchers intend to begin experiments at the end of March to mix the avian influenza virus with the human influenza virus, and then study how easily the two viruses bind, which gene swaps are most likely to occur, and which of the different combinations of genes of the two viruses is the most harmful, Stoll said. The researchers will first mix the viruses in vitro and then inject the mixed viruses into animals for experiments. Storr said that experiments with stoats might be conducted first, and then other animals such as monkeys would be selected.

However, he did not say which countries the research would be conducted in laboratories.

Don't be afraid, it's just a popular **, you see that the dead are generally the elderly and children, and they have poor resistance. Usually, the popular ** risk will also kill people.

Avian influenza is mainly an infectious disease caused by influenza A virus, which rarely infects humans due to species barriers. However, due to the continuous emergence of its variants, some of them have the ability to infect humans, and even caused a series of regional human infection events, posing a threat to people's lives. Among the many avian influenza subtypes that can directly infect humans discovered so far, a series of clinical symptoms and hazards caused by the highly pathogenic H5N1 and H7N9 subtypes are of particular concern.

Human infection with avian influenza virus has more severe respiratory symptoms than that of common influenza virus, and the disease progresses rapidly, with severe symptoms and even death.

After being infected with the avian influenza virus, most people will have fever symptoms, and the body temperature will continue to be above 39 degrees.

Avian influenza virus infection initially presents with similar cold symptoms to the common influenza virus, with symptoms such as cough, nasal congestion, sore throat, headache, muscle aches and general malaise, and the symptoms are severe and develop rapidly.

Some infected patients may have digestive symptoms, such as nausea, vomiting, diarrhea, and some patients may even have gastrointestinal bleeding and stress ulcers.

Avian influenza is mainly an infectious disease caused by influenza A virus, which rarely infects humans due to species barriers. However, due to the continuous emergence of its variants, some of them have the ability to infect humans, and even caused a series of regional human infection events, posing a threat to people's lives. Among the many avian influenza subtypes that can directly infect humans discovered so far, a series of clinical symptoms and hazards caused by the highly pathogenic H5N1 and H7N9 subtypes are of particular concern.

Almost all patients infected with avian influenza will have obvious symptoms of pneumonia, such as chest tightness and shortness of breath, cough and sputum production, dyspnea or hemoptysis, which can rapidly develop into acute lung injury, pulmonary hemorrhage and pleural effusion, acute respiratory distress syndrome, etc.

In addition to severe respiratory disease, severe patients with avian influenza can also be combined with damage or failure of other systems and organs, such as heart failure, and can be secondary to severe bacterial infection, such as sepsis, septic shock, etc., and some severe patients can have coma and consciousness disorder.

Because the early symptoms of human infection with avian influenza are difficult to distinguish from those of the common cold, and it develops rapidly and causes great harm to the body, if there are cold symptoms such as fever in the high-incidence season or high-risk areas, sufficient attention should be paid to and countermeasures should be taken as soon as possible.

Human avian influenza is an acute respiratory infection caused by certain strains of avian influenza A virus. In addition to infecting humans, influenza A viruses can also infect pigs, marine mammals and poultry. The main avian influenza virus subtypes infected humans are H5N1, H7N1, H7N2, H7N3, H7N7 and H9N2, among which patients infected with H5N1 are seriously ill and have a high case fatality rate.

According to the pathogenicity of avian influenza, avian influenza can be divided into highly pathogenic avian influenza, low pathogenic avian influenza and non-pathogenic avian influenza. Avian influenza caused by the H5N1 serotype at home and abroad is called highly pathogenic avian influenza, and the morbidity and mortality are very low, and the harm is huge.

Summary. According to the Chinese Center for Disease Control and Prevention, from January 1, 2019 to June 30, 2019, China reported a total of 3 cases of avian influenza, including 2 cases of H7N9 avian influenza and 1 case of H5N6 avian influenza, while globally, it is estimated that more than 200 million people are infected with avian influenza each year.

Is there a large number of people with avian influenza in China at present?

According to the Chinese Center for Disease Control and Prevention, from January 1, 2019 to June 30, 2019, China reported a total of 3 cases of avian influenza, including 2 cases of H7N9 avian influenza and 1 case of H5N6 avian influenza, while globally, it is estimated that more than 200 million people are infected with avian influenza each year.

I'm sorry I don't understand, but can you elaborate on that?

According to the Chinese Center for Disease Control and Prevention, from January 1, 2019 to June 30, 2019, China reported a total of 3 cases of avian influenza, including 2 cases of H7N9 avian influenza and 1 case of H5N6 avian influenza, while globally, it is estimated that more than 200 million people are infected with avian influenza each year.

Now there is no avian influenza disease in poultry, and there is no harm in susceptibility as long as you understand the pathogenesis and the principle.

Although American scientists have recently analyzed eight genetic fragments of the "Spanish flu" influenza virus that killed 20 million to 50 million people in 1918, and speculated that it may have been transmitted directly from some animal to humans, and is very similar to the mutation of the H5N1 avian influenza virus in Asia, it was officially reported that the avian influenza virus infected people in 1997, that is, in the "Hong Kong avian influenza" incident, 18 people were hospitalized and 6 people died. In 2004, Viet Nam and other countries successively reported the infection of humans with the H5N1 subtype avian influenza virus, and so far 121 people have been reported to be infected and 62 people have died. In addition, in 2003, the Netherlands National Influenza Centre reported that 83 poultry workers and their family members were infected with the H7N7 subtype avian influenza virus, and that the majority of infected patients exhibited clinical signs such as conjunctivitis, some with influenza-like symptoms, and the H7N7 subtype of avian influenza virus was isolated from a veterinarian who died of acute respiratory asphyxia syndrome (ARDS).

From the cases reported so far, both infected and fatal, there is a history of contact with birds with or from which the virus has been infected, meaning that only those who have been in close contact with chickens and ducks that have been infected or died from avian influenza are likely to be infected. And among the currently circulating strains of avian influenza viruses, not all avian influenza viruses can infect humans. There is currently no evidence that the H5N1 subtype of avian influenza virus can be transmitted from person to person.

Nevertheless, we need to be fully aware of the public health problems caused by avian influenza viruses infecting humans. Due to the variability of avian influenza viruses and the increasing prevalence of the H5N1 subtype avian influenza viruses, the possibility of human-to-human transmission of avian influenza viruses due to mutation should be taken seriously.

The avian influenza in Sichuan will affect human health to a certain extent, but the impact is not very large, because although it can be transmitted to humans, the probability of infection is very small, and it has not been found to be transmitted from person to person, so people do not need to worry. <>

First, the mode of transmission.

Avian influenza is between livestock and livestock, livestock and people to spread, people and livestock can be transmitted but the possibility of transmission is very small, in recent years, the appearance of avian influenza is also relatively ordinary, every time avian influenza appears, it will also cause the death of many livestock, bringing a lot of losses to farmers, because livestock are generally raised together, so it is easy to spread, but the poultry infected with avian influenza will be well placed, and the dead poultry will be harmlessly treated, although you don't have to take it to heart, but also to protect your own health. <

Second, the way of prevention.

In farmers, farmers will carry out different forms of prevention and control of avian influenza in different periods when raising poultry, and will also receive veterinary inspections for poultry prevention, and the protection of vaccines in this process will also be very in place, so as long as you do a good job of protection, epidemic prevention, avian influenza is not easy to occur, so it can better reduce losses. People don't get bird flu easily, so everyone must face every virus with a positive attitude. <

Third, provide protection for self-hygiene

In daily life, we should also do a good job of protecting ourselves, avoid being infected by some viruses, take care of ourselves, know how to clean ourselves, ensure frequent hand washing, wash hands before and after meals, disinfect the home frequently, and ventilate by the window to ensure that the indoor air is fresh. Be responsible for yourself and be responsible for others.

Thank you for reading, I hope you find it helpful and I hope you enjoy it.

No, because now people have developed drugs against avian influenza, so there is not much danger from avian influenza in Sichuan.

No, the bird flu that has just emerged in Sichuan has been taken seriously by the state and will be brought under control soon. Once controlled, there will be no danger to human health.

No, it is only the avian flu transmitted among poultry, which will only cause some losses to poultry and will not endanger human health for the time being, but people should also raise their awareness of prevention.

If you don't eat it, it shouldn't be harmful, because avian influenza is not very contagious to humans. There are risks that can be avoided as long as measures are taken, and there is not much impact.