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Original title: Will it be difficult to find a single shot when flu vaccines are released in many places?
Chinanews client, Beijing, Sept. 9 (Reporter Zhang Ni) As the fall falls, as the temperature drops, many people put the fall and winter flu vaccine vaccination on the agenda. In the context of the new corona pneumonia epidemic, the demand for vaccination this year is higher than in the past. Will the phenomenon of “difficult to get vaccinated” appear?
Flu Vaccines Are Being Launched In Many Places
November through March of the following year is the peak season for influenza.
Since it generally takes 2 to 4 weeks after influenza vaccination to produce a protective level of antibodies in the human body, September through October of each year is the best time for influenza vaccination.
The journalist combed his hair and discovered that influenza vaccines have now been launched in many provinces of the country.
For example, the 60,000 flu shots scheduled for the first round in Gansu province had been vaccinated before the end of August. On September 1, the first domestically made nasal spray flu vaccine was also vaccinated in Shandong Province. In addition, Beijing also launched the 2020-2021 influenza vaccine procurement tender in August.
From a local policy perspective, many cities have also given preferential treatment to some special groups this year.
According to a recent announcement issued by the Hangzhou Center for Disease Control and Prevention, it is clear that people over the age of 70 in Hangzhou can receive the flu vaccine for free.
Xiangyang City also announced that from September to October, all kinds of school students and kindergarten children in the city will be vaccinated free of charge for influenza vaccination, and special works will be completed before the end of October for inspection. , replacement and replanting of vaccination certificates for children and students.
Why is flu vaccination so important this year?
The spread of the new corona pneumonia epidemic around the world has also made the prevention and control of influenza this fall and winter particularly interesting.
According to this year’s WHO tracking, three of the four most prevalent influenza virus strains in the Northern Hemisphere have changed.
In August this year, World Health Organization officials publicly stated that due to the indistinguishable symptoms of novel coronary pneumonia and influenza, along with limited medical resources, countries should increase the vaccination rate of the flu shot, fight the flu, and focus on fighting the epidemic.
In China, Wang Chen, an academic at the Chinese Academy of Engineering and an expert in respiratory medicine and critical care medicine, and others have suggested that the most effective prevention method is to vaccinate the influenza vaccine on time and expand the population.
In response to the influenza prevention and control situation in the fall and winter of this year, vaccine expert Tao Lina discussed in an interview with a Chinanews.com reporter, “Changes in the strains of the influenza virus influenza are currently predictions. It does not mean that these strains will be prevalent. Although the strains change every year, they are generally relatively small. If a major mutation is actually predicted, it will definitely be ready. “
Taolina emphasized that the importance of influenza vaccination this fall and winter is mainly due to two factors: First, from the perspective of general control of the epidemic, if a patient develops a fever after being vaccinated, they can consider fewer influenza factors. . To reduce interference with the judgment of the epidemic, second, there is evidence that if the double infection of new coronary pneumonia and influenza occurs, the symptoms will increase.
He said that compared to other types of vaccines, the protection rate of flu vaccines is relatively low. The current protection rate of influenza vaccines is generally 60% to 70%, which means that to form a protection group, the vaccination fee is very demanding.
Demand for vaccination increases, is the flu vaccine enough?
Statistics show that in the past, the domestic flu vaccination rate was around 2% per year, which is much lower than that of some Western countries. However, affected by this year’s epidemic, the willingness of people to get vaccinated has increased significantly.
“Last year, only the children in the family were vaccinated against influenza, but this year I want the whole family to be vaccinated as much as possible, in the hope of reducing the risk of running to the hospital.” Beijing citizen Ms. Chen said in an interview with reporters that she has been following Beijing recently. I hope I can make an appointment as soon as possible.
Zhang Xiaoshu, director of the Institute of Immunization Program at Gansu Provincial Center for Disease Control and Prevention, previously stated that this year’s vaccination peak in Gansu province was ahead of schedule, and the impact of the new epidemic crown pneumonia is a major reason.
In Shanghai, the disease control department initially predicts that the demand for influenza vaccination in the fall and winter of this year will increase by about 50% over previous years.
In this context, the question of whether this year’s vaccination will produce a contradiction between supply and demand has also come into focus.
“The shelf life of the vaccine is only one year. In the past, the vaccine produced by the company had a relatively high waste rate every year. The company was concerned that the vaccine produced could not be used, so he dared not produce too much. ” Taolina explained that in the past, professionals Staff pay a lot of attention to influenza vaccination, but the public is not paying enough attention, so the domestic vaccination situation is not ideal, which also leads to low capacity to company production.
However, the vaccine supply this year is expected to increase significantly compared to previous years.
According to the statistics on the batch release of biological products issued by the China Food and Drug Control Institute, as of September 8, more than 15 million doses of influenza vaccines were approved, including trivalent vaccines against influenza. influenza, quadrivalent influenza vaccines, and recently listed lyophilized noses. There are three types of live flu vaccines.
Also, compared to last year, the number of companies that have been approved for flu vaccines this year has risen to seven.
Taolina revealed that, judging by information reported by flu vaccine companies, the number of batches of flu vaccine issued this year is expected to be at least double that of last year. However, experts believe that whether there will be a shortage of demand depends on the actual demand for vaccination this year.
About influenza vaccination, they should be understood!
——Preference for vaccination against influenza
In principle, anyone 6 months and older who is willing to get vaccinated against influenza and has no contraindications can get vaccinated against influenza.
It is recommended that the following key populations prioritize vaccination: children 6 months to 5 years; elderly 60 years and older; patients with chronic diseases; medical staff.
—— Timing of influenza vaccination
Typically, 2 to 4 weeks after vaccination with the influenza vaccine, a protective level of antibodies is produced. It is recommended that people complete vaccination before the epidemic season. Those who have not been vaccinated before the epidemic season can also be vaccinated throughout the epidemic season.
After vaccination, the protective effect can be maintained for 6 to 8 months, gradually weakening over time, and the influenza virus is prone to mutating, so it is recommended to receive the influenza vaccine every year.
——How to choose different vaccines?
The number of strains contained in the trivalent vaccine and the quadrivalent vaccine is different. The quadrivalent influenza vaccine has one more type than the trivalent influenza vaccine, and the range of protection is wider than that of the trivalent vaccine, but the trivalent vaccine is cheaper.
The nasal spray vaccine is a recently marketed vaccine. It is an attenuated vaccine in terms of technology. The vaccine contains live virus and is vaccinated by nasal spray to further simulate the natural infection process.
Regardless of the type of vaccine, it has a preventive effect on influenza. People can choose the flu vaccine that is best for them based on their actual needs.
——The protection rate of the influenza vaccine is not 100%
The protection rate of the flu vaccine is not 100%, so it is possible to get the flu after the vaccine.
The public should maintain good personal hygiene habits in the fall and winter, including: wearing masks, washing hands frequently, paying attention to respiratory etiquette (covering mouth and nose with tissue when coughing or sneezing), open windows to ventilate, eat a balanced diet, and get moderate exercise; During flu season, high-risk groups should try to avoid crowd gathering places. (Finish)
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