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The Side Effects of Vaccines - How High is the Risk?

The Big Picture: Vaccines and the Debate#

Vaccines are generally celebrated because they’ve played a huge part in fighting off diseases. But, you might have noticed there’s a growing group of people who think they actually endanger our health instead of protecting it. The internet is absolutely full of stories claiming things like allergic reactions, new disabilities, or even death happened right after someone got a vaccination shot.

Now, it’s true, vaccines can have side effects. So, let’s take a look at how they actually work and figure out how risky they truly are.

How Your Immune System Fights Back Naturally#

Think of your immune system as a super complex army with billions of tiny cells. You’ve got the soldiers, the intelligence folks, and even weapons factories. Every single day, you’re attacked countless times by germs, but usually, your immune soldiers handle it so well you don’t even notice.

If an infection gets serious, though, the intelligence cells kick into gear. They gather info about the attackers and then fire up those weapons factories. You know the weapon: antibodies. These are like specially made missiles targeted exactly at that specific invader. The catch? This whole process takes several days to get going. That gives the germs plenty of time to do damage.

Now, contrary to that old saying, what doesn’t kill you doesn’t always make you stronger. Our bodies really don’t want to fight serious battles over and over. So, our immune system came up with this really clever way to get stronger over time. If you fight an enemy that’s dangerous enough to make your body bring out the heavy weapons, your immune system automatically creates memory cells.

These memory cells stick around in your body for years, kind of in a deep sleep. All they do is remember that specific enemy. If that enemy ever attacks a second time, these sleeping memory cells wake up instantly! They order quick, coordinated attacks and start pumping out antibodies right away. This reaction is so fast and effective that many infections you beat once will never make you sick again. You might even be immune to them forever.

This is actually why little kids seem to get sick all the time – they haven’t had enough time yet to build up a big collection of these memory cells. And this amazing natural system is exactly what vaccines build on.

How Vaccines Work#

As awesome as memory cells are, getting them by actually getting a dangerous infection is often unpleasant and sometimes really dangerous. Vaccines offer a way to trick your body into making memory cells and becoming immune without actually getting seriously sick.

They basically pretend to be a dangerous infection. One common way they do this is by injecting versions of the invader that can’t actually cause harm. This might be the germ that’s been killed or even just broken into pieces. Your immune system usually handles these types of vaccines pretty easily.

Sometimes, though, you need to make the immune system work a bit harder to create even more memory cells. That’s where live vaccines come in. Using a live invader sounds a bit scary, right? An enemy that can fight back seems like a bigger challenge than a dead one. What if the germs win?

To avoid that scary outcome, scientists in labs breed a kind of weak cousin of the real germ. It’s just strong enough to bother the immune system and get it to produce enough memory cells, but not strong enough to actually cause the full, dangerous disease.

So, that’s the basic idea behind how vaccines work. They trigger that natural reaction in your body to make you immune to very dangerous diseases. Some germs, like the flu virus, change so often that you need a new vaccine every year. But most vaccines protect you for years, maybe even your whole life.

But, there’s always a flip side, right? Like everything, vaccines have side effects.

The Risks of Vaccines#

This is where things get a bit complicated to compare directly. When you look at vaccine side effects versus the effects of diseases, the numbers can seem wild. For example, hundreds of millions of people in places like the West are vaccinated against measles. But in Europe in 2018, there were only 83,000 measles cases.

With numbers that different, even mild side effects from vaccines can seem really scary when compared to a disease we just don’t see much of anymore.

Before the measles vaccine came out in 1963, pretty much every single child on Earth caught measles at some point. We’re talking an estimated 135 million cases globally every single year in the 1950s!

Now, in 2019 (when this info was compiled), you might ask, “Is measles really that dangerous now? With our modern healthcare and technology, are the risks of vaccine side effects worth it?”

Let’s do a little thinking experiment using real numbers to see.

Thought Experiment: Measles Without Vaccines#

Imagine a developed country in a parallel world – good healthcare, everything modern, but people decide to stop vaccinating. In this scenario, let’s say ten million children catch measles.

What happens to them?

  • About 9.8 million (98%) will get a high fever and a really awful rash.
  • Up to 800,000 (8%) will suffer from dangerous diarrhea.
  • 700,000 (7%) will get an ear infection, which can permanently hurt their hearing.
  • 600,000 (6%) kids will get pneumonia – this is the most dangerous thing about measles. Pneumonia alone would kill 12,000 children out of that group.
  • Up to 10,000 (0.1%) children would get encephalitis (brain swelling).
  • 2,500 (0.025%) kids would get SSPE. This is a disease where the measles virus hangs out in their brain and eventually kills them a few years later.

Adding it all up, around 2.5 million children in this group would have somewhat serious effects from measles. And about 20,000 children would die from it.

But it doesn’t stop there. The kids who do beat measles are left with a really damaged immune system that takes a long time to get back to normal. This leaves them open to catching other diseases during that recovery time, which can cause even more problems. And aside from all that, your kids are almost guaranteed to feel absolutely miserable for about two weeks.

Thought Experiment: MMR Vaccine Risks#

Okay, so that’s measles itself. Now, let’s be fair and look at the risks of the vaccine. Let’s repeat our thought experiment, but this time, we vaccinate those same ten million children with the MMR vaccine (Measles, Mumps, and Rubella).

What theoretically might happen?

After getting the shot:

  • Around 10% (one million kids) might get a fever.
  • 500,000 (5%) might get a mild rash.
  • Up to 100 (0.001%) might have a serious allergic reaction requiring medical treatment.
  • Up to ten boys (0.0001%) might get inflammation of the genitalia.
  • Up to ten kids in total (0.0001%) might experience the most serious side effect: encephalitis (brain swelling).

So, out of those ten million vaccinated kids, around one hundred and twenty total had side effects that were considered somewhat serious. Thanks to good medical care in developed areas, almost all of them would likely recover completely.

Specific Concerns: Autism and Death#

What about autism? The idea that vaccines cause autism comes from a single source that has been proven wrong countless, countless times by many studies. (The video description usually has links for more info if you want to dig deeper). By 2019, it’s considered a fact that vaccines do not cause autism.

Alright, but what about deaths from vaccines? It’s incredibly hard to say if even a single one of those ten million vaccinated kids would die. The creators of the original content really looked hard and talked to many different experts. If you look past unofficial reports online and only count documented cases since the MMR vaccine was introduced in 1971 (meaning across hundreds of millions of children vaccinated), they could only find a tiny handful of documented deaths.

Measles is many, many thousands of times more dangerous for your child than even the absolute worst-case scenario for vaccine side effects. You’d need a giant magnifying glass to search for documented lethal vaccine side effects, and even then, finding confirmed cases is extremely difficult. Meanwhile, deaths from measles are real and easy to find. In 2017 alone, 110,000 people worldwide died from measles. Statistically, on an average day back then, 300 children would die of measles. One child died just since the video started playing.

Think of vaccines like seatbelts. Can weird, freak accidents happen where someone is killed by their seatbelt? Yes, very rarely. But do you personally think it’s safer for your kid to not wear a seatbelt? Probably not.

What If Your Child Can’t Be Vaccinated? The Power of Herd Immunity#

Wait a minute, you might think. What if my kid is actually allergic to a vaccine? What if what you’re saying doesn’t apply to my specific situation?

If your children genuinely cannot be vaccinated for medical reasons, then you need to become the biggest supporter of vaccination around! Why? Because if your children can’t get vaccinated themselves, the only thing that can protect them is the people around them getting vaccinated.

This is called herd immunity. It means that enough people in a community are immune to a disease (either through vaccination or having already had the illness) that the disease can’t easily spread. It hits immune person after immune person and dies out before it can reach those who aren’t protected.

But to get herd immunity for something like measles, you need a very high percentage – about 95% of the people around you need to be vaccinated.

Wrapping It Up: Facts vs. Feelings#

The tough thing about the debate around vaccines is that it often feels like it’s not a fair fight. While the people who support vaccines usually use studies and statistics, the arguments against them often mix gut feelings, personal stories, and wrong information. And unfortunately, feelings can sometimes be immune to facts.

Yelling at people won’t convince them. But we also can’t ignore the real things that happen because of anti-vaccine ideas. They tragically lead to the deaths of babies too young to be vaccinated and healthy children who just happen to be in the wrong place at the wrong time. They bring serious diseases that we had almost gotten rid of right back.

The biggest, most important “side effect” of vaccines is actually having fewer dead children.

Vaccines are truly one of the most powerful tools we have to get rid of these terrible diseases that most of us have thankfully forgotten about. Let’s make sure we don’t bring those beasts back!

Okay, let’s break down this information about vaccines and diseases into easy-to-understand bits, just like we’re chatting.

How Vaccines Work (and the Catch!)#

  • Some vaccines, like the one for the flu virus, need to be updated every year because the virus changes so much.
  • But most vaccines give you protection for many years, sometimes even for your whole life.
  • Here’s the catch: Just like everything else, vaccines have another side to them. This side is called side effects.
  • So, the big questions are: What exactly are these side effects? And what happens if your child gets one?

The Risks Involved: Comparing Vaccine Side Effects and Diseases#

  • It’s tricky to directly compare vaccine side effects with the effects of getting a disease.
  • Think about measles, for example. Hundreds of millions of people in places like the West get vaccinated against it. But in Europe in 2018, there were only 83,000 actual measles cases.
  • When the numbers are so different, even small side effects from a vaccine can seem worrying compared to the bad effects of a disease we hardly see anymore.

Measles Before Vaccines: A Look Back#

  • Before the measles vaccine came out in 1963, pretty much every single child on Earth caught measles at some point.
  • In the 1950s, it’s estimated there were 135 million cases every single year.

Are Measles Still Dangerous Today?#

  • Given our modern healthcare and new technologies, some might wonder: are measles really that dangerous in 2019?
  • Is it worth the risk of vaccine side effects when we have better ways to treat diseases? Let’s try a little thought experiment based on real numbers to see.

Thought Experiment: What Happens If 10 Million Children Get Measles?#

  • Imagine a country with good healthcare, but where people decide to stop vaccinating.
  • In this made-up scenario, let’s say ten million children catch measles. What would that look like?

Here’s what would likely happen to those 10 million kids based on real data:

  • 9,800,000 (98%): Would get a high fever and a really unpleasant rash.
  • Up to 800,000 (8%): Would suffer from dangerous diarrhea.
  • 700,000 (7%): Would get an ear infection, which could cause permanent hearing loss.
  • 600,000 (6%): Would suffer from pneumonia, which is the most dangerous thing that can happen with measles.
    • Pneumonia alone would kill 12,000 children.
  • Up to 10,000 (0.1%): Would get encephalitis (swelling of the brain).
  • 2,500 (0.025%): Would get SSPE (Subacute Sclerosing Panencephalitis). This is a terrible disease where the measles virus stays in the brain and sadly kills the child a few years down the road.

Putting it together for these 10 million kids:

  • Around 2.5 million children would have somewhat serious problems from measles.
  • About 20,000 children would die from measles.

Beyond the Illness: Long-Term Effects#

  • It doesn’t end when the kids get over the measles itself. Their immune system is badly damaged and takes a long time to get back to normal.
  • This leaves them open to other diseases doing more harm during that recovery time.
  • Besides all the serious stuff, it’s pretty much guaranteed that your kids would feel really sick for about two weeks.

Okay, What About Vaccine Risks?#

  • It’s only fair to look at the risks with vaccines too. Let’s run that thought experiment again.
  • This time, imagine we vaccinate ten million children with the MMR vaccine (that’s for Measles, Mumps, and Rubella). What might happen here?

Here’s what could theoretically happen to those 10 million vaccinated kids:

  • Around 10%: Would get a fever after the shot.
  • 500,000 (5%): Would get a mild rash.
  • Up to 100 (0.001%): Might have a serious allergic reaction that needs medical treatment.
  • Up to 10 boys (0.0001%): Might get inflammation of the testicles (part of the genitalia).
  • Up to 10 kids in total (0.0001%): Might get encephalitis, which is the most serious known side effect of the MMR vaccine.

Let’s total that up for the 10 million vaccinated kids:

  • Around 120 children in total might have side effects that are considered somewhat serious.
  • Thanks to good medical care in places like the developed world, almost all of these children would be okay.

Addressing the Autism Question#

  • The idea that vaccines cause autism comes from one specific source that has been proven wrong many, many times since.
  • (The original content mentions linking to more info, but we’re just reporting what’s here).
  • Based on what we know in 2019, it’s accurate to say that vaccines do not cause autism.

What About Deaths from Vaccines?#

  • Trying to figure out if even one child out of our 10 million vaccinated kids would die from the vaccine is really hard.
  • Lots of experts were consulted and research was done, and if you look at documented cases (not just reports people make themselves), there are only a tiny handful of recorded cases for all the hundreds of millions of children who have received the MMR vaccine since it was introduced in 1971.

Comparing the Dangers Directly#

  • Measles is many, many thousands of times more dangerous for your child than even the absolute worst possible side effect from a vaccine.
  • You’d need a giant magnifying glass to find documented cases of death from vaccine side effects, and even then, it’s very tough to confirm them.
  • Deaths from measles, on the other hand, are sadly very real and easy to find.
  • In 2017 alone, 110,000 people died from measles worldwide.
  • Statistically, right now, 300 children will die of measles today. One has died since the original content started talking.

Thinking About It Like Seatbelts#

  • You can compare vaccines to seatbelts in a car.
  • Are there freak accidents where someone is killed by their seatbelt? Yes, sometimes that can happen in a very unusual situation.
  • But do you honestly think it’s safer not to put a seatbelt on your child? Most people would say no, the overall risk is much lower with the seatbelt.

What If Your Child Can’t Get Vaccinated?#

  • Hold on, what if your child actually has an allergy or a medical condition that means they can’t be vaccinated? What if these general comparisons don’t fit your situation?
  • If your child can’t be vaccinated, you actually need to become the biggest supporter of vaccination there is!
  • Why? Because if your children can’t get the vaccine themselves, the only thing that can protect them is the community around them being vaccinated.

Understanding Herd Immunity#

  • This protection from the community is called herd immunity.
  • Herd immunity works because enough people are protected (immune) from a disease that it can’t spread easily. The disease runs into immune people so often that it dies out before it can reach those who aren’t immune, like your child.
  • To get herd immunity for measles specifically, you need about 95% of the people around you to be vaccinated.

Conclusion#

  • The tough thing about the conversation around vaccines is that it often isn’t a fair fight.
  • People who support vaccination use studies, numbers, and evidence.
  • Arguments against vaccines are often a mix of feelings, personal stories (anecdotes), and just plain wrong information.
  • And let’s be honest, facts don’t always change how people feel. We won’t convince everyone by yelling.
  • But we also can’t ignore the serious consequences of anti-vaccine beliefs and conspiracy theories.
  • They tragically cause deaths:
    • They kill babies who are too young to get vaccines.
    • They kill healthy children who are just unlucky enough to catch a preventable disease.
    • They are bringing back serious diseases that we had almost gotten rid of.
  • The biggest side effect of vaccines, when you look at the big picture, is simply fewer dead children.
  • Vaccines are incredibly powerful tools we have to fight off dangerous diseases that many of us have forgotten about.
  • Let’s make sure we don’t let those “beasts” come back!
The Side Effects of Vaccines - How High is the Risk?
https://youtube-courses.site/posts/the-side-effects-of-vaccines-how-high-is-the-risk_zbkvcpbnnku/
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YouTube Courses
Published at
2025-06-28
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CC BY-NC-SA 4.0