Immunology

Bananas prevent cancer – debunking another myth about food

I wrote this article over five years, debunking the claim that bananas prevent cancer, and it remains the most popular article I’ve ever written. It probably gets so much traffic because of the ongoing memes about how bananas will cure every cancer known to man.

Too many individuals see these memes on Twitter and Facebook, then they accept them as scientific facts. They rarely are. That’s why critical thinking is necessary.

But if a meme is going to make an extraordinary claim, like bananas prevent cancer, then that claim ought to be backed by extraordinary evidence. But this wild belief about bananas is not even supported by ordinary evidence. It is supported by zero evidence.

Breastfeeding cannot replace a vaccine – let’s talk about passive immunity

One of the pervasive myths expressed by the anti-vaccine world is that one or all childhood vaccines can be replaced by breastfeeding. Somehow, these people believe that breast milk is such a powerful agent of the immune system that vaccinations are unnecessary. But that’s not based on any science related to human physiology, especially with respect to the immune system.

These beliefs represent a misunderstanding of how our immune system functions, especially regarding the role of passive immunity. Breastfeeding, of course, has a lot of benefits to both the developing baby and the mother. But we shouldn’t endow it with magical qualities, especially with regards to how it operates with the infant’s own immune system.

I want to take some of your time here to give a condensed version of immunology, especially the differences between passive and adaptive immunity. And I want to show how breastfeeding complements the developing baby’s immune system.

Hygiene hypothesis – what is it, and why the anti-vaccine religion abuses it

One thing you’ll notice from all science deniers is a tendency to overstate or overuse a fairly solid scientific principle inappropriately. The anti-vaccine crowd takes this to a whole new level. And what we’re going to discuss today is the hygiene hypothesis, which describes how early exposure to microorganisms may assist the immune system to avoid allergic reactions.

Although we’ll discuss the scientific evidence in support of the hypothesis later in this article, anti-vaxxers tend to abuse it. They conflate potentially beneficial organisms, such as the gut biome, with dangerous and deadly pathogens, like measles and polio. The former may be a critical component of the hygiene hypothesis, but the latter is not.

Time to tackle this scientifically controversial topic, and put to rest one of the tropes of the anti-vaccine religion that all germs are good.Read More »Hygiene hypothesis – what is it, and why the anti-vaccine religion abuses it

Boosting the immune system – that’s what vaccines do

by Michael Simpson
2019-08-24
5 Comments
Cancer, Flu vaccine, Immunology, Vaccines

Immune system myths are one of the common claims of the junk medicine crowd, especially the anti-vaccine activists. The pseudoscience of the immune system is pernicious and possibly dangerous.

It’s frustrating that the pseudoscience from the junk medicine crowd claims that this supplement or that food is critical to boosting the immune system – hang out for a day on Facebook, and you’ll probably see way too many memes saying that all you have to do to boost your immune system is eat a blueberry kale smoothie. I still see that dumb banana claim that it cures cancer.

The problem with these immune system myths is that they overlook or ignore a basic physiological fact – the immune system is a complex interconnected network of organs, cells, and molecules that prevent invasion of the body by hundreds of thousands, if not millions of pathogens and other antigens every single day.

And no matter how much individuals try to trivialize the complexity of the immune system, it does not make it so. One can claim all day long that downing a few tablets of echinacea will boost the immune system to prevent colds (it doesn’t), it doesn’t make it scientifically accurate. Nor does it create an accurate description of the immune system.

HPV vaccine and lupus – bad expert testimony in a lawsuit

In a lawsuit filed with a court in Israel a young girl and her mother are suing, apparently (since I do not have the lawsuit, I’m reporting based on a news report that included an interview with the girl’s mother) claiming that the girl was negligently administered an HPV vaccine because the family was not warned that it can trigger an autoimmune disease, lupus. Because the evidence does not support the claim that there is a link between the HPV vaccine and lupus, the claim is unfounded, and should be rejected. The Ministry of Health is not required – and should not – warn parents about risks vaccines do not have: that would be misleading those parents.

Child food allergies – time to revise our recommendations and thinking

When I was in public school in the 1970s, I honestly recall few kids with food allergies. Today, child food allergies are so high, some school system ban peanut butter and jelly sandwiches for lunch. And if you’re an American, peanut butter and jelly sandwiches are an iconic lunch food for school age children.

My recollection of few of any child food allergies when I was a child myself. As an anecdote, that’s not too powerful, but it’s borne out by actual scientific data. For example, Australian children have the highest rate of food allergy in the world, with up to 10% of infants and 20% of school-aged children who have been diagnosed with a food allergy. Large studies, including a retrospective study of over 1 million children in the USA, have shown that overall food allergy prevalence was 6.7%. The most common allergenic foods were peanuts (2.6%), milk (2.2%), egg (1.8%), shellfish (1.5%), and soy (0.7%). Furthermore, food allergies were associated with development of respiratory issues such as asthma (2.16X risk over those without food allergies) and rhinitis (2.72X risk).

In Australia, there has been a 50% increase in hospital visits for anaphylaxis from 1998 to 2012, the most severe allergic reaction. Infants and toddlers accounted for much of this increase. Anaphylaxis is the most serious allergic reaction to anything including food.

What stumps a lot of researchers is why the increase? Has our food supply become more allergenic? Some blame the addition of GMOs to our food supply, but that’s nonsense. In fact, some very good research may point us toward new recommendations to prevent child food allergies.

The pseudoscience of immune system boosting

by Michael Simpson
2019-08-24
6 Comments
Cancer, Immunology, Pseudoscience, Vaccines

One of the most ridiculous pseudoscientific claims that I keep hearing from the junk medicine crowd is that this supplement or that food is critical to immune system boosting – this myth is so prevalent, I had to debunk it with lots of real science.

These type of claims ignore one basic physiological fact: the immune system is a complex interconnected network of organs, cells, tissues and biomolecules that prevent invasion of the body by hundreds of thousands, if not millions of pathogens every day.

And no matter how much individuals try to trivialize the complexity of the immune system by claiming that downing a few tablets of echinacea will boost the immune system to prevent colds (it doesn’t), it still doesn’t make it a scientific fact.

So let’s take a look at why “immune system boosting” can be considered a pseudoscience. And to discuss pseudoscience, we will have lots of real science.

Boosting the immune system – sorting science from myth

by Michael Simpson
2019-08-24
68 Comments
Flu vaccine, Immunology, Logical fallacy, Vaccines

This article has been updated and republished to clear up some points, and add another section. The comments for this article are closed, please comment at the new article.

One of the most ridiculous pseudoscientific claims that I keep hearing from the junk medicine crowd is that this supplement or that food is critical to boosting the immune system – it’s so prevalent that I believe I read it several times a day.

These type of claims ignore one basic physiological fact: the immune system is a complex interconnected network of organs, cells, and molecules that prevents invasion of the body by hundreds of thousands, if not millions of pathogens every day. And no matter how much individuals try to trivialize how complicated the immune system is by claiming that downing a few tablets of echinacea will boost the immune system to prevent colds (it doesn’t), it doesn’t make it science.

And it isn’t that simple.

Multiple vaccinations weakens the immune system – a myth

by Michael Simpson
2017-07-13
34 Comments
Anti-vaccines, Immunology, Infectious disease, Vaccines

If you explore the dark and myth filled back alleys of the antivaccination movement, you will find a wide variety of myths that try to convince people that vaccinating children is dangerous. I’ve covered and refuted many of the myths, although the vaccine deniers tend to rely on zombie myths that keep returning over and over again, never quite dying.

These myths range from outrageous, such as it’s a conspiracy of the government to control population (which I find odd, since the government is barely competent enough to build a post office), to scientific sounding, but ultimately pseudoscientific claims. There are a lot of great websites that debunk many of the myths, and they’re easy to find.

One of the most annoying legends of the antivaccination cult is that multiple vaccinations weakens the immune system of the poor baby’s tender physiology. About that immune system? It’s comparatively strong relative to almost every other organ system in the body.

Infant T cells don’t remember pathogens–causes weaker immunity

by Michael Simpson
2014-12-04
4 Comments
Immunology, Infectious disease, Vaccines

If you hang out in various vaccine discussions, you will hear all kinds of odd, unscientific ideas about the immune system of infants. One of the major issues is a substantial oversimplification of the immune system (of adults and infants), mostly thinking it’s one “thing,” ignoring the complex physiology of the immune system which is an almost infinite number of interactions between cells, proteins and factors, organs, blood, fluids, and other physiological systems.

Generally, the popular assumption is that the infant immune system is weak, making those children more prone to viral or bacterial infections. The antivaccine crowd uses this belief to either state that vaccines won’t work or might actually harm the immune system, along with some overstated magical properties of human breast milk to prevent infection.

But according to a new study, led by Dr. Brian Rudd of the Department of Microbiology and Immunology at Cornell University, published in the Journal of Immunology, the immune system of newborns and infants is actually stronger than an adult’s immune system. Unfortunately, it has a short “memory.”Read More »Infant T cells don’t remember pathogens–causes weaker immunity