Why is a booster shot sometimes necessary




















Doctors can prescribe booster shots for people of all ages. Sometimes they can be especially important for people with specific medical conditions, lifestyles, travel patterns, or occupations.

In addition, teens or adults need Tetanus, Diphtheria, Pertussis, shingles, varicella, Measles, Mumps, Rubella, and most recently, Covid vaccine boosters. For many viral and bacterial diseases, prevention is the most effective and best form of treatment that we have.

Vaccines help protect us from diseases. However, once we have been vaccinated for a particular disease, we might think we are always safe from it. That is not necessarily the case. For some diseases, that protection wears off over time. In other cases viruses change or mutate, making the vaccine less effective against the newer version of a pathogen. Last week, my own mother, a retired medical technologist, asked me whether she should get a booster. She paused. The battle over boosters is about more than semantic precision.

To fully capture what boosters can and should do, though, we may need to reframe what that word means to us—or, as some have argued, dispense with it entirely. But the word sprouted independent of immunization, as the linguist Ben Zimmer recently wrote. We use boosters to raise up children sitting in cars, and to launch rockets into the beyond; boosters naturally evoke ideas of support or benefit, which makes them a PR windfall.

But this perky portrait of boosters might obscure why we need them at all. The primary series can comprise a single dose, or more commonly , multiple, as with two-dose MMR shots, or three-dose hepatitis B vaccines. But once they do, they might never need another injection again. Primary-series doses, in other words, are generative.

Boosters are the optional second chapter in this story. Boosters are restorative , meant to put back something that was once there, but has since been at least partially lost. Not every shot administered in regular intervals is a booster: The annual flu shot, whose ingredients change every year, is issued less because our bodies are forgetting a specific strain, and more because the many viruses we encounter change so rapidly. What we now refer to as boosters, then, might be better described as refresher, refill, or reminder shots—something that signals not just growth, but growth from a place of temporary loss.

A booster vaccine could have prevented the second diphtheria outbreak. It is important to stay up to date on booster vaccines to avoid incidences such as this. It is necessary to know whether a vaccine from a certain disease requires a booster later on. Booster need depends on a variety of factors including disease progression and immunological memory.

Immunological memory refers to the ability of the immune system to respond to a detected pathogen. The faster the immune system can recognize a pathogen and prevent a sickness, the better. If enough time has passed since the vaccination, and the disease can progress rapidly. It may even spread faster than the body can respond. In cases involving slow-moving infections, the immune memory is activated with plenty of time to respond. In these instances, a booster vaccine is not necessary to maintain immunity.

No one wants to get infected with an illness they thought they were immune to. Sometimes, it can be hard to remember. Long period of time can pass without needing a booster — the tetanus booster is only needed every ten years. This memory response includes antibody responses, but also includes an additional arm of the immune system controlled by a different group of white blood cells called T cells or T lymphocytes.

T cell immune responses are especially important for viral infections like those with SARS-CoV-2, but are more difficult to study than antibody responses outside of a research laboratory setting, adds Dr. But here in the U. If you were among the unlucky recipients who felt really ill or had any of the rare but largely harmless reactions to your initial COVID vaccination, you may be leery of the idea of a third dose, in case it causes a similar or worse reaction.

Shaw says he understands this sentiment. That certainly speaks to the need to vaccinate the world, especially to drive down infection rates that support the emergence of new variants," he says. Skip to Main Content. Boosters are now recommended for those 65 and up and in other groups. Updated: Oct. His answers are below.



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