How is the flu transmitted and what kind of infectious disease does the flu belong to?

Mode of transmission There have been confirmed cases of human-to-human transmission of influenza A (H1N1) viruses and can be transmitted to pigs. It is transmitted through a similar route to seasonal influenza, usually through coughing and sneezing by an infected person.

What influenza viruses belong to from the perspective of infectious diseases; What does it belong to from the perspective of immunity?

Pathogen antigens.

H7N9 avian influenza is included in the list of notifiable Category B infectious diseases, what is the classification of Category A, B and C?

The general principles of classification of infectious diseases are transmissibility and case fatality rates. In fact, infectious diseases are only divided into two categories: Category B and Category C, which are legally significant. Category B infectious diseases mean that the state needs to take planned vaccination, carry out compulsory and public inspections, and carry out social control projects such as systematic control of the source of infection or the transmission link.

As you can see, the vaccination work is done around Class B infectious diseases. Category C infectious diseases mean that we don't need too much intervention and control, we just need to grasp the flow of infectious diseases. The simple, inaccurate way to put it is:

Brother B's class infectious disease is to take various feasible methods to reduce its incidence at this stage, and class C is left to him, because his energy is limited. How did Class A infectious diseases come about? Because cholera, plague, and yellow fever are international quarantine infectious diseases, but China is not an endemic area for yellow fever, the Class A infectious diseases in China are cholera and plague.

Pulmonary anthrax in anthrax is managed as a Class A infectious disease because of its infectivity and case fatality rate. A(H1N1) is classified as seasonal influenza because it has passed the pandemic period and is now circulating together with influenza A (H3N2) and influenza B. Seasonal influenza vaccines are also included in these 3 strains.

Although H5N7 and H7N9 have high case fatality rates, there is currently no evidence of human-to-human transmission. The reason why it is classified as a Class B infectious disease is that on the one hand, it is considered that it may have the possibility of further mutation, and on the other hand, it is estimated that there is also a consideration to maintain the sensitivity of the infectious disease surveillance network.

Beg. What kind of infectious disease is avian influenza?

Class A infectious disease, a member of orthomyxovirus, is a zoonotic disease.

Wear a mask and drink plenty of water, and drink a little more antiviral oral liquid. Enhance physical activity and eat more beef.

Influenza is caused by influenza rocky ridge attack virus, which can be divided into three types: A(A), B (B), and C (C). A H1N1 is also a type of A type. The disease is self-limited, but in infants, young children, the elderly, and patients with underlying cardiopulmonary diseases, it is easy to develop serious complications such as pneumonia and lead to death.

Epidemic ** epidemic (referred to as influenza) is an acute respiratory infection caused by influenza virus, and it is also a highly contagious and fast-spreading disease. It is mainly transmitted through airborne droplets, person-to-person contact, or contact with contaminated items. Typical clinical symptoms are:

Sudden onset of high fever, generalized round pain, significant fatigue, and mild respiratory symptoms. Autumn and winter are the peak periods, and the complications and deaths caused are very serious.

Influenza A is one of the subtypes of influenza.

In 1918, the influenza virus first spread in the barracks of the United States, spread to Europe as the American army participated in World War I, and finally spread to the world, infecting about 1 billion people worldwide and killing 50 million to 100 million.

Influenza, whose full name is Epidemic ** Epidemic, is an acute respiratory infection caused by influenza viruses.

The influenza virus is an RNA virus whose genetic material is RNA, and it also has a protein envelope with various protrusions.

Influenza viruses are broadly divided into three types: A, B and C, which can cause influenza A, B and C respectively, among which influenza A virus is the most pathogenic.

Avian influenza, swine flu, H7N9, H5N1, etc. are all caused by influenza A viruses. Influenza A virus is the most contagious and has the highest fatality rate.

At present, there are only two types of influenza B virus, the Yamagata strain and the Victoria strain, and the transmissibility is not as strong as that of influenza A virus, and the harmfulness of influenza B is far less than that of influenza A.

Influenza C virus is less transmitted, has a lower incidence, and is only slightly more troublesome than the common cold.

After being infected with the influenza virus, pay attention to rest and recuperate, and most people will slowly recover after a week or two.

Influenza is a respiratory infection caused by the influenza virus, and common symptoms include fever, cough, sore throat, nasal congestion, headache, muscle pain, and fatigue. The flu is usually prevalent during the winter months and can be spread through contact with droplets or surfaces that carry the virus. Preventive measures include vaccination, frequent hand washing, avoiding contact with sick people, and practicing good hygiene.