Common influenza vaccine problems: (compiled from CDC website)

Frequently asked questions about influenza vaccine: Q 1. Do I have to get the flu vaccine every year?

A: Yes, the virus strains prevalent every year are slightly different. The original vaccination was not immune to viruses with different antigen types, which led to the decrease of protection effect. But the virus has not mutated, and its composition is the same as that of the vaccine. After four to six months of inoculation, the protective effect began to decline, and the protective power generally did not exceed one year. Therefore, it is recommended to vaccinate once a year, which is a consistent practice in the world.

Q2。 Is influenza vaccination really protective?

Ans: According to foreign literature, the protective power of influenza vaccine varies with age or physical condition. It can protect healthy adults by 70% to 90%, reduce the severity and complications by 50% to 60%, and reduce the mortality rate by 80%.

Q3。 When should I get the flu vaccine to get protection?

Ans: Over the years, the flu epidemic started to heat up in late October from 165438+ to the end of the Lunar New Year. After 2 or 3 months, it tends to be flat, and it will take at least two weeks after vaccination to produce protection. It is suggested that high-risk and high-transmission groups should be vaccinated as soon as possible in the 10 flu season.

Q4。 But after the flu vaccine, did you catch a cold (or catch the flu)?

A: The common cold is caused by hundreds of different viruses and bacteria, while influenza is an acute respiratory infection caused by influenza virus. They are different.

The virus strains contained in public influenza vaccine are the three most popular virus types at present, not all of them, and the virus is easy to mutate, and it is still possible to infect other types of influenza after vaccination. There are also individual differences in the protection effect after influenza vaccination, and a few people may be infected with the virus under insufficient protection.

Q5。 There are two kinds of influenza vaccines, domestic and imported. Is the protection effect the same? Is the flu vaccine good at public expense or at one's own expense?

Ans: The protective effect of domestic and imported vaccines is the same; The same is true for public or self-funded influenza vaccines, both of which meet the inspection and registration requirements of the Ministry of Health and Welfare of the Food and Drug Administration. Each batch of vaccines has passed the inspection and obtained the license.

Influenza vaccines are only trivalent (2 types A, 1 type B) and tetravalent (2 types A, 2 types B), and tetravalent vaccines need to be paid at their own expense. Usually there are three vaccines at public expense, that is, trivalent vaccines, so trivalent vaccines cannot be compared with tetravalent vaccines.

Q6。 I got the flu vaccine today, but I need other vaccines. What should I do?

Ans: Because influenza vaccine is inactive, it can be inoculated in different parts at the same time or at any time with other vaccines.

Q7。 What should I pay attention to after vaccination against influenza? ?

Answer:

There is a small chance that there will be an immediate allergic reaction after vaccination, leading to anaphylactic shock. In order to get medical treatment immediately after the incident, you should take a short rest at or near the vaccination unit and observe for at least 30 minutes after vaccination, and leave after no discomfort. For those who use antiplatelet or anticoagulant drugs or have abnormal coagulation function, pressurize the injection site for at least 2 minutes after taking the drug to observe whether there is still bleeding or hematoma. After vaccination, we should pay attention to whether there are any abnormalities such as persistent fever (more than 48 hours), dyspnea, rapid heartbeat, consciousness 6 or behavior changes. If you feel unwell, you should seek medical advice as soon as possible, inform the doctor about the symptoms, the time of symptoms and the time of vaccination as a diagnostic reference, and inform the local health bureau or the disease control department. After vaccination, although the probability of influenza virus infection can be effectively reduced, other respiratory infections may still occur. Please pay attention to personal health care and various preventive measures to maintain your health.