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A JAMA study compared the effectiveness of the vaccine in children who had been vaccinated or who had not been vaccinated the previous year. (Photo: Getty Images)
Getting the flu shot is like wearing underwear. It's not because you did it last year that you should not do it this year.
In addition, as with underwear, the protection offered by a flu vaccine does not last forever. Although the duration of the protection can vary considerably from one person to the other, in some cases the protection may disappear after about 6 months, which is still much longer than the wearing of -clothing. This is one of the reasons why you should get the flu shot every year, assuming you have at least six months, because you can read it and you have no medical reason (ex. A life-threatening allergy) to not receive the vaccine.
Another reason is that the strains of the flu virus look like the stars of reality TV. Different come and go from year to year. As a result, the strains of an influenza vaccine and therefore the strains you are protected from vary from year to year.
And if you're worried that the flu vaccine will reduce your immunity against influenza every year, check out the study that has just been published in JAMA. In fact, do not just look at it, read it. For the study, a research team recruited children who had visited outpatients at Baylor Scott & White Health (Temple, Texas), Marshfield Clinical Research Institute (Marshfield, Wisconsin), Vanderbilt University Medical Center (Nashville, Tennessee) and Wake. School of Forest Medicine (Winston-Salem, North Carolina) during the 2013-2014, 2014-2015 and 2015-2016 influenza seasons. To be able to participate in the study, a child had to have fever and acute respiratory illness and be real children (ages 2 to 17 years) instead of really immature adults. The research team eventually enrolled 3369 children in the study. Every child has received an influenza test. The researchers checked whether each child had received the flu shot the previous year. This allowed the researchers to divide the children into 4 groups, depending on whether or not they received the influenza vaccine the year of enrollment and the previous year:
- Received the vaccine both in the year of registration and the year before.
- Received the vaccine just the year of registration
- Received the vaccine only the previous year.
- Did not receive the vaccine every year
About 23% (or 772) of the children tested positive for the flu. About half (1674) had received the influenza vaccine. Each year, children could have received one of two types of influenza vaccines: one containing the live but weak virus that squirts in the nose and the one that contains the dead virus that is injected into the arm.
The researchers attempted to evaluate the effectiveness of the influenza vaccine by comparing the percentage of people who tested positive for influenza among those who received the vaccine compared to those who did not. had not received the vaccine during the year of registration. Of course, this is a somewhat indirect way to estimate the effectiveness of the flu shot. In addition, children visiting a clinic for fever and respiratory diseases do not necessarily represent the general population.
Nevertheless, the study found no evidence that receiving the vaccine the previous year reduced the effectiveness of the vaccine the following year. In other words, according to the results of the study, receiving the vaccine last year will not reduce the effectiveness of the vaccine and increase the risk of getting the flu this year. In fact, the results of the study suggest that having the vaccine the year before can help further strengthen the protection of the vaccine against certain types of influenza, types B.
So why not get the flu shot every year, as recommended by the Centers for Disease Control and Prevention (CDC)? And change your underwear a lot, a lot more often. If you want to maximize your immunity against the flu, you must get vaccinated every year. There is no scientifically proven way to dramatically increase your immunity against this virus, which could kill you, no matter what your condition. Staying healthy by eating well and doing physical activity can help to some extent. But a supplement, a particular food or a magic potion will not offer you the same immunity as a flu shot. Do not listen to supplement vendors who claim to have protection against the flu and who have no scientific evidence to support it. As underwear worn too long, many claims of protection against dummy flu can become really lousy.
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A JAMA study compared the effectiveness of the vaccine in children who had been vaccinated or who had not been vaccinated the previous year. (Photo: Getty Images)
Getting the flu shot is like wearing underwear. It's not because you did it last year that you should not do it this year.
In addition, as with underwear, the protection offered by a flu vaccine does not last forever. Although the duration of the protection can vary considerably from one person to the other, in some cases the protection may disappear after about 6 months, which is still much longer than the wearing of -clothing. This is one of the reasons why you should get the flu shot every year, assuming you have at least six months, because you can read it and you have no medical reason (ex. A life-threatening allergy) to not receive the vaccine.
Another reason is that the strains of the flu virus look like the stars of reality TV. Different come and go from year to year. As a result, the strains of an influenza vaccine and therefore the strains you are protected from vary from year to year.
And if you're worried that the flu vaccine will reduce your immunity against influenza every year, check out the study that has just been published in JAMA. In fact, do not just look at it, read it. For the study, a research team recruited children who had visited outpatients at Baylor Scott & White Health (Temple, Texas), Marshfield Clinical Research Institute (Marshfield, Wisconsin), Vanderbilt University Medical Center (Nashville, Tennessee) and Wake. School of Forest Medicine (Winston-Salem, North Carolina) during the 2013-2014, 2014-2015 and 2015-2016 influenza seasons. To be able to participate in the study, a child had to have fever and acute respiratory illness and be real children (ages 2 to 17 years) instead of really immature adults. The research team eventually enrolled 3369 children in the study. Every child has received an influenza test. The researchers checked whether each child had received the flu shot the previous year. This allowed the researchers to divide the children into 4 groups, depending on whether or not they received the influenza vaccine the year of enrollment and the previous year:
- Received the vaccine both in the year of registration and the year before.
- Received the vaccine just the year of registration
- Received the vaccine only the previous year.
- Did not receive the vaccine every year
About 23% (or 772) of the children tested positive for the flu. About half (1674) had received the influenza vaccine. Each year, children could have received one of two types of influenza vaccines: one containing the live but weak virus that squirts in the nose and the one that contains the dead virus that is injected into the arm.
The researchers attempted to evaluate the effectiveness of the influenza vaccine by comparing the percentage of people who tested positive for influenza among those who received the vaccine compared to those who did not. had not received the vaccine during the year of registration. Of course, this is a somewhat indirect way to estimate the effectiveness of the flu shot. In addition, children visiting a clinic for fever and respiratory diseases do not necessarily represent the general population.
Nevertheless, the study found no evidence that receiving the vaccine the previous year reduced the effectiveness of the vaccine the following year. In other words, according to the results of the study, receiving the vaccine last year will not reduce the effectiveness of the vaccine and increase the risk of getting the flu this year. In fact, the results of the study suggest that having the vaccine the year before can help further strengthen the protection of the vaccine against certain types of influenza, types B.
So why not get the flu shot every year, as recommended by the Centers for Disease Control and Prevention (CDC)? And change your underwear a lot, a lot more often. If you want to maximize your immunity against the flu, you must get vaccinated every year. There is no scientifically proven way to dramatically increase your immunity against this virus that could kill you, regardless of your condition. Of course, staying healthy by eating well and doing physical activity can help to some extent. But a supplement, a particular food or a magic potion will not offer you the same immunity as a flu shot. Do not listen to supplement vendors who claim to have protection against the flu and who have no scientific evidence to support it. As underwear worn too long, many claims of protection against dummy flu can become really lousy.
