How long does the flu vaccine work? Will you get the flu after the flu shot?

The flu vaccine is an influenza virus inactivated vaccine that produces antibodies in the human body after vaccination, thereby exerting a protective effect. So, how long does the flu vaccine work? How long is the flu vaccine valid? Also, will you get the flu after the flu shot?

How long does the flu vaccine work? Will you get the flu after the flu shot?

 How long does the flu vaccine work?

It usually takes about 15 days after the flu vaccine to produce effective protective antibodies. Therefore, it is recommended to start vaccination about one month before the peak of influenza epidemic in order to play a more effective role in vaccine protection. It is generally appropriate to get a flu shot from September to November before the annual influenza epidemic, and a 60%-90% protection effect can be obtained.

Of course, the specific onset time, individuals may have differences. Vaccines rely on the immune system of an individual to produce an immune response, so if the immune system is different, it may affect the concentration and duration of antibodies produced.

In addition, just because there is a 15-day onset time, it also means that after the flu vaccine, you may still get flu or general flu. Therefore, if the flu vaccine is feverish after the fight, but the body temperature is too high, it may be coupled with other diseases, be vigilant. Therefore, after the flu vaccine, pay attention to keep warm and avoid colds.

Is the flu shot effective?

Why is the flu season so bad this year?

Is the flu shot effective?

Different influenza strains are prevalent each year. According to the US Centers for Disease Control and Prevention, this year, the H1N1 flu is particularly prevalent. According to the US Centers for Disease Control and Prevention, in most H3-based years, the country often finds more serious cases of influenza, especially in young children and the elderly, as well as reduced vaccine efficacy, leading to more total infections and more. Hospitalization. According to the Centers for Disease Control and Prevention, the H3 virus is also after the severe flu season in 2014-2015 and 2012-2013. A separate influenza virus H1N1 virus has also appeared in some parts of the country, increasing the number of viruses. The CDC sounds like a warning of a fatal flu epidemic; they call for an emergency meeting because the epidemic spreads

How widespread is the flu this year?

Since the influenza season monitoring began on October 1, approximately 60,000 samples have been tested positive for influenza in clinical or public laboratories. The current hospitalization rate is 22.7 per 100,000 US residents. The US Centers for Disease Control and Prevention claims that the 2017-2018 flu epidemic is an epidemic, but points out that it meets this standard technically almost every year. Jenigan said at the briefing: "We are at the peak now, and we may see it below the baseline in a few months. "So, yes, we are definitely popular, but every year in the US and the Northern Hemisphere The flu has occurred. ”

If you decide to get a flu shot, be sure to know these points.

In the flu season, flu vaccination is an effective measure to prevent flu. The elderly with basic diseases and children with relatively weak resistance are the key vaccinators. The best time to get a flu shot is before the start of the annual flu season. After one week of flu vaccination, antibodies can be produced. After two weeks, the immune antibody reaches the highest level and is generally protected for one year.

If you decide to get a flu shot, be sure to know these points.

You have to understand these misunderstandings:

1. Misunderstanding: last year's flu vaccine can still be played this year

Positive solution: flu vaccines vary from year to year

Unlike the common cold, the flu is an acute respiratory infection caused by a highly susceptible influenza virus. It can be divided into three types: A, B, and C. Each type is subtyped. In fact, basically the beginning of the annual analysis of the flu virus began to produce vaccines, so that the annual flu vaccine is changing.

2. Misunderstanding: Everyone is suitable for flu vaccine

Positive solution: pregnant women and severe allergies should be cautious

Not everyone is suitable for flu vaccination, such as people who are allergic to eggs and any kind of vaccine components and those with severe chronic diseases can not be vaccinated; fever, acute infection, acute chronic diseases should be postponed vaccination; pregnant women and severe allergies Physical fitness should be carefully selected for vaccination.

3. Misunderstanding: no cold after flu shot

Positive solution: still cause colds caused by bacteria, etc.

Health care workers said that vaccination against the flu does not mean that they will not catch a cold. The flu vaccine is only for the flu. It only produces antibodies against the flu virus, but it does not prevent or resist the cold caused by bacteria, other viruses or mycoplasma. ability. Therefore, some people have caught a flu vaccine and have caught a cold. They think that the vaccine has no effect, but it is not.

How many children can get a flu shot? Don’t vaccinate a baby under 6 months.

It takes at least six months for the baby to get a flu shot. For more than 6 months, it is best to give a child a flu shot for a 1-year-old baby. Because the child's immunity is poor, the baby can be protected from the flu vaccine. For babies under 6 months, because the antibodies brought from the mother after birth are still there, they have not disappeared, so there is no need for vaccination.

How many children can get a flu shot? Don’t vaccinate a baby under 6 months.

Existing flu vaccines cannot be directly vaccinated for infants younger than 6 months, and flu can be prevented by vaccination during pregnancy, vaccination against babies' family members and caregivers.


Influenza vaccine baby has to take a few shots

Children between 6 months and 3 years old need to take two needles a year. The interval between the two needles is 28 days, 0.25ml per needle. For those over 3 years old, 0.5ml per needle per needle, 0.5ml per needle.