The flu season is coming! Influenza vaccine or not? After that, we will arrange!

Flu may be late, but never absent Recently, the National Influenza Center released the latest data As of December 8, 2019, the level of influenza activity in China's southern and northern provinces continued to rise, and the number of outbreaks increased significantly Most of China's provinces have entered this year's winter epidemic season With the coming of influenza season, influenza vaccine has become a hot topic According to China's technical guidelines for influenza vaccination (2019-2020) issued by the China Center for Disease Control and prevention, annual vaccination is the most effective measure to prevent influenza But all kinds of questions about the flu vaccine make a lot of little friends wondering: did you get the flu vaccine last year and do you want to get it this year? Can pregnant women be vaccinated against influenza? Don't panic! The following medicine baby on the flu vaccination related questions for you to answer one by one What is a flu vaccine? The vaccine used to prevent influenza caused by influenza virus is called influenza vaccine Influenza vaccine belongs to vaccination at one's own expense At present, many countries, including China, mainly use the inactivated influenza virus vaccine Influenza vaccines approved for marketing in China include trivalent inactivated vaccine (iiv3) and Tetravalent Inactivated Vaccine (iiv4): iiv3 covers a strain of influenza A virus including a H1N1 and a H3N2 and a strain of influenza B virus Iiv3 includes two dosage forms of 0.25ml and 0.5ml, which can be used for vaccination of people aged ≥ 6 months Iiv4 covers influenza A viruses including H1N1 and H3N2, while influenza B viruses are divided into four strains: B / Yamagata (by) and B / Victoria (BV) Iiv4 is only 0.5ml, which can be used for vaccination of people aged ≥ 36 months When is the flu vaccine? In China, especially in the north, winter and spring are the annual flu season Most of the flu occurs between November and February However, it takes about two weeks after vaccination to produce antibodies with specific immune function Therefore, it is recommended that the influenza vaccine be inoculated before the influenza epidemic season (September to November) every year Of course, it's still useful to get vaccinated even after the flu season! It is very necessary for the elderly, children, pregnant women, patients with chronic diseases and medical staff and other high-risk groups to receive influenza vaccine Family members and caregivers of infants under 6 months old, pregnant women and patients with chronic diseases should also consider influenza vaccine Is it necessary to vaccinate every year? Last year, I got the flu vaccine Is it necessary this year? That's a must! Next, yaowa and everyone have a good break to talk about the reason! 1 There is no guarantee that it will definitely work Like many drugs, influenza vaccine can only guarantee that most people (generally 10% - 60%) can have protective immunity Even if a few people are vaccinated with influenza vaccine, they can also have infection caused by corresponding influenza virus 2 The protective effect of the vaccine declines with time Generally, the antibody with protective level can be produced in the human body after 2-4 weeks of vaccination The antibody titer begins to decline after 6-8 months Therefore, it is recommended to vaccinate the influenza vaccine every year 3 The mismatch between vaccine and virus strains in most years, the matching degree of influenza vaccine and influenza epidemic strains is good, with good protection However, there is also a certain probability that the influenza vaccine strain does not match the epidemic strain, thus affecting the protection effect of the influenza vaccine 4 As its genetic material is single negative strand RNA, the changeable influenza virus has great variability when it replicates, resulting in the variation of the virus every year After the variation, the antibody we originally produced will be useless, which will be "helpless" for the new epidemic virus Therefore, even those who have already been vaccinated against influenza need to be vaccinated against the current year's influenza vaccine according to the latest guidelines of the disease control department Is it safe for pregnant women to be vaccinated against influenza? It is said that the vaccination of pregnant women with influenza vaccine will make pregnant women infected with influenza virus, aggravate their pregnancy reaction, affect the health of the fetus, and even lead to fetal malformation But is it really the case? Of course not! Vaccination for pregnant women is not only harmless, but also beneficial! The technical guidelines for influenza vaccination in China (2019-2020) issued by the China Center for Disease Control and prevention clearly indicates that pregnant women are at high risk of influenza, so it is recommended to give priority to influenza vaccination This is because after pregnancy, the body immunity of pregnant women is weaker than that of the general population, and they are easily attacked by influenza virus, resulting in complications of respiratory system, cardiovascular system and other organs In addition, studies have shown that influenza in pregnant women can affect the fetus and newborn, such as stillbirth, premature delivery and low birth weight Therefore, influenza vaccination during pregnancy can not only protect women, but also provide continuous protection for newborns in the first six months of life (this is the most vulnerable six months for newborns, and because they are too young to take the initiative to vaccinate) However, it should be noted that it is OK to vaccinate inactivated vaccine during pregnancy, but it should be prohibited to vaccinate non inactivated vaccine, otherwise there is a potential risk of infection of the fetus Warm tips: the following people are not recommended to be vaccinated: 1 People who are allergic to any ingredients (including adjuvants, formaldehyde, lysate and antibiotics) contained in the vaccine It should be noted here that the Pharmacopoeia of the people's Republic of China (2015 Edition) does not make it a taboo to those who are allergic to eggs In addition, foreign scholars' research on vaccination of inactivated or attenuated influenza vaccine against egg allergens shows that they will not have serious allergic reactions Since 2016, the American immune Advisory Committee (ACIP) has suggested that egg allergens can also be vaccinated with influenza vaccine 2 For mild to moderate acute diseases with or without fever symptoms, it is recommended to vaccinate them after the symptoms subside 3 If there is Guillain Barre syndrome within 6 weeks after the last influenza vaccination, consult a doctor before deciding whether to vaccinate Penicillin is the reprinted content of yaozhi.com, and the copyright belongs to the original author The purpose of reprinting is to transmit more information, which does not represent the view of this platform If the content of the work, copyright and other issues are involved, please contact our website message, we will delete the content in the first time.