Why did I get a cold after getting a flu shot?

In winter, many people will choose to go to the hospital to receive the flu vaccine, the flu vaccine can effectively prevent the spread of influenza, everyone also thinks that if you get the flu vaccine, you will not catch a cold again, this understanding is a certain misunderstanding, and we still have many misunderstandings about the flu vaccine.

Influenza is a virus-infected disease, and there is no specific drug specifically for viruses in the world, so timely vaccination with influenza and other vaccines can effectively prevent the spread of influenza and other viral diseases, and many people think that as long as they are vaccinated with influenza, they will not catch a cold, which is wrong. So why do we still catch a cold after we get the flu vaccine? Let's talk about some of our misunderstandings about the flu vaccine!

Influenza vaccine, as the name suggests, can only play a preventive role in epidemic **, and the effect is average for the common cold. Normally, it takes half a month after receiving the flu vaccine to produce effective antibodies, and some people get a cold before they produce effective antibodies. And there are different types of flu vaccines, but we live in the school, and each flu vaccine can only prevent the virus that causes this flu, and the prevention effect is very average for the flu caused by other viruses.

There are also people who think that if you get a flu vaccine once, you will not get a cold again, this idea is wrong, the effect of the flu vaccine will only last for about a year, so you should be vaccinated with the flu vaccine every year to achieve a good preventive effect.

The following is to clarify some misunderstandings about getting the flu vaccine: some people think that the flu vaccine received last year can continue to be the same this year, which is a misunderstanding, because the flu vaccine is different every year, and the virus that causes the flu is easy to mutate. Some people think that everyone can get the flu vaccine, which is also a misunderstanding, this pregnant woman, and patients with severe allergies, are not suitable for the flu vaccine, and some patients with acute infection should also postpone the flu vaccine.

We have learned so much about influenza vaccination, we need to remind everyone that we should not blindly rely on influenza vaccination to prevent colds, and we must also do a good job of preventive health care in the flu season, try not to go to crowded public places, especially in a closed environment, when going out to take public transportation, wear a mask, wash your hands in time after going home, etc., can effectively prevent influenza.

After the vaccine enters the human body, it will cause the human body to have a rejection reaction, resulting in an adverse reaction similar to a cold, but in fact, it is not a cold. Mild adverse reactions include: pain, redness, swelling, and fever at the injection site.

These symptoms may last for 1 to 2 days. However, if the adverse effects persist or worsen, then it is necessary to see a doctor as soon as possible. Here is a reminder that vaccination may also cause rare allergic reactions and complications, and you should seek medical attention in time.

But this is highly unlikely and far less likely than the risk of severe flu.

It is also important to say that the flu vaccine is only against epidemics and will produce antibodies to the influenza virus. Colds caused by bacteria, other viruses or mycoplasma have no ability to prevent and resist them. In other words, if you catch a cold or other non-flu virus because you wear too little clothing, the flu vaccine will not play a role in immunity.

It is also possible to be infected after receiving the flu vaccine, because the effect of the flu vaccine is to reduce the chance of the vaccinated person being infected and reduce the symptoms of the flu, which does not mean that the person who received the flu vaccine will not be infected. Some people may wonder, since it is still possible to be infected after vaccination, then the vaccine is not effective? This is wrong, because after vaccination, even if you are infected, the symptoms will be much reduced, and the risk factor will be greatly reduced.

Influenza vaccination in advance is effective in preventing influenza, and it is generally most effective to get influenza vaccine one or two months earlier during the peak influenza period. Although the symptoms of influenza are similar to those of the common cold, it is much more dangerous than the common cold, which not only lasts for a long time, but also causes a variety of complications, so the harm of influenza must not be underestimated. Although ordinary drug prevention can also have a certain effect, it is still recommended that everyone get vaccinated against the flu.

After receiving the flu vaccine, some people will show symptoms of a cold, low-grade fever, and weakness, if the situation improves in the short term, there is no need to worry, only need to target specific symptoms**, which will not affect the effect of the vaccine. However, the more adverse effect is that there is temporary redness, swelling or pain at the injection site, so getting a flu vaccine is not so scary. <>

When flu season rolls around, be sure to practice good personal hygiene. Exercise more in daily life, enhance physical fitness, keep the environment ventilated, and try to avoid entering crowded places. If some symptoms appear, you should rest at home in time, and seek medical attention as soon as possible if the situation does not improve, without delay.

The flu is much more powerful than the common cold, so you must not be careless during flu season and be cautious about every case of cold symptoms.

No, because after the flu vaccine, there are antibodies in the body, and with more antibodies, the body will not be infected with the flu virus again.

There are people who still get the flu after getting the flu vaccine, because the flu vaccine only plays a preventive role, but it may also fail, and it is impossible to be 100% successful.

There is a flu vaccine to get the flu, because the effect of the flu vaccine is very small, and the key is related to one's own physique.

No. Even if you get a flu shot, you can get the flu. The reason for this is that the flu vaccine can prevent a limited number of types of influenza, and new types of influenza emerge every year.

No, the flu vaccine only prevents some types of influenza, not all influenzas, and it only plays a certain protective role, and it cannot be said that the flu is completely influenza.

You can also get the flu, the flu virus is easy to mutate, even if you have been vaccinated against the flu, there is still a risk of the flu, it can only be said that the risk of the flu is reduced, and it will not disappear completely.

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Analysis: Why do I still catch a cold after getting the flu vaccine?

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Epidemic ** flu (referred to as "influenza") is an acute respiratory infectious disease caused by influenza virus, which is harmful because of its rapid epidemic and the various serious complications it causes. During the flu season, people tend to take various precautions such as smoking vinegar, opening windows, drinking antiviral powders, and getting vaccinated against influenza, which is currently the most effective way to prevent influenza.

However, I have also met some people who are unimpressed with the flu vaccine: "I got the flu vaccine last year, but I still don't catch a cold?" "I've had a flu shot and I still get the flu, is it still useful?" "Actually, these people still don't know much about the flu vaccine.

First of all, the pathogens that cause influenza and the common cold are different, the former is influenza virus, while the latter has more than 200 pathogenic microorganisms, mainly rhinovirus and mycoplasma. Influenza vaccine is only against influenza viruses, especially influenza A1, A3 and B, which are highly susceptible to influenza epidemics. Therefore, the flu vaccine will only produce antibodies to the corresponding influenza virus strains, and has no effect on the pathogenic microorganisms that cause colds.

Knowing this, you can understand why the flu vaccine does not protect against the common cold.

Secondly, it takes 1 to 2 weeks after the flu vaccine to reach the peak of antibodies in the body. Therefore, to get the flu vaccine, you must rush half a month before the arrival of the flu epidemic season. If you are infected with the influenza virus just after vaccination, the antibodies in the body are not enough to fight the influenza virus, and you may still get the flu.

Generally speaking, the elderly and the frail are often more likely to get the flu due to their lower immunity. Therefore, flu vaccination should be prioritized for this group of people. However, for healthy people and young adults, there is also a risk of influenza virus infection, so they should also be vaccinated against influenza at the right time and should not be careless.

Since the influenza vaccine is prepared from chicken embryos, people who are allergic to eggs should not be vaccinated. In addition, those who have acute infection, fever, advanced cancer, cardiopulmonary failure and severe allergies should not be vaccinated against influenza. Wuxi Center for Disease Control and Prevention Emergency Communication Department Qian Yanhua.

Because there are too many types of influenza viruses to protect against them at all, influenza viruses are a general term for influenza viruses, not the name of a virus. And the root cause of vaccination is to avoid severe illness caused by contracting the virus. Therefore, it is normal to get the flu after the flu vaccine.

Just like this new crown pneumonia, many people are not the same as vaccinated? It's still going to be a new crown, but it won't turn into a serious illness, so it's better to get sick**.

1.Why can't the flu vaccine completely protect against the flu virus?

Because there are too many variants of influenza virus, influenza virus has become a general term for a virus species, and there are now three main types of influenza viruses: type A, type B, and type C. The structure of these different influenza viruses is much the same. Our flu vaccines only target some specific structures of these influenza viruses to defend against the virus, and if the structure of the influenza virus changes, these vaccines will be ineffective.

Naturally, it will not be able to stop the invasion of the influenza virus, like this new crown vaccine, the more new variants, the lower the protection ability of the vaccine, this is because the structure of the virus has changed, and the role of the vaccine is not great.

2.If you can't prevent it, why do you need to get vaccinated?

Because the vaccine itself is not given to keep you from getting sick. The role of the vaccine is to prevent people from getting terminally ill and give people a chance to be saved. Therefore, there is nothing wrong with vaccination, because you can't think that you will never get sick if you get a vaccine, which is unrealistic and impossible, because the virus will mutate, and although the structure of the knowledge changes with each mutation, the efficacy of the vaccine will change greatly.

But basically, after you get vaccinated, it's very difficult to become seriously ill when you get sick.

In general, there are two reasons why you can get the flu after getting the flu vaccine, one is that there are many types of influenza viruses, and the vaccine cannot completely protect against them; The second is that the flu vaccine is not to avoid getting the flu if you get vaccinated, but to avoid getting terminally ill.

The flu vaccine is to prevent the flu, not to eliminate it. Moreover, the flu vaccine takes at least two weeks to produce antibodies, and if the patient has the flu virus within two weeks, it will also get the flu; There are many diseases that cause influenza, and maybe your flu vaccine is useless for this disease; The flu vaccine is only useful for influenza A and B.

Because the flu vaccine only serves a basic protective effect, if your health gets worse and worse, you will eventually get infected with the disease.

This is because there are many pathogens that can cause influenza, and it is not possible to obtain immunity against all types of influenza viruses in one vaccination.

Vaccines are only effective against one or more viruses that have caused epidemics, and are not effective against new viruses or the common cold caused by colds.

It takes half a month after vaccination, the human body can produce antibodies, in layman's terms, it is to produce resistance, during this period people with low immunity may still suffer from influenza, and the validity period of the flu vaccine is only one year, and it needs to be re-vaccinated after one year, and the recommended vaccination time in China is from September to November every year.

Studies have proved that even if you are infected with influenza again, as long as you have been vaccinated, the symptoms will be milder than those of people who have not been vaccinated, and the course of the disease will be shorter, especially the probability of serious complications caused by influenza will be much reduced, so it cannot be considered that the flu vaccine is ineffective, and you can gain immunity to the same type of virus after being infected with the influenza virus, but there is no cross-immunity between the individual type and the subtype, and you can reverse the disease, so you can not benefit for life after getting the flu, and you still need to strengthen exercise and pay attention to the prevention of influenza.

What happens to a cold after vaccination.

10,000 views. Chief Physician Guo Xiaoying.

Pediatric General Internal Medicine, Baoqing County People's Hospital.

Go to consult. Disease analysis: the vaccine is a kind of live attenuated vaccine developed by the predecessors of medical workers through unremitting efforts, the vaccine is an allogeneic for the human body, after being injected into the human body, the baby with low immune function will have some low-grade fever reactions, most of the body temperature fluctuates above the degree, below 38 degrees, don't worry, this fever does not belong to the cold, it is a normal reaction to the vaccine, no special treatment is required, observation for 3 days is basically fine, individual body temperature is more than 38 degrees, can be physically cooled, If fever persists, ibuprofen suspension can be taken by mouth.