A system of biological structures and processes within an organism that protects against disease.

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Can morning sex strengthen your immune system for the day?

http://www.womenshealthmag.com/sex-and-relationships/morning-sex Morning sex can strengthen your immune system for the day by enhancing your levels of IgA, an antibody that protects against ...
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Can cold viruses remain dormant in your bones, and later emerge when you are exposed to cold temperatures?

I was recently hiking in mountains with some colleagues after a business trip. None of us had proper gear for 2000m, and consequently were rather cold. Now, all of us have advanced degrees in ...
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Does garlic enhance immune system?

There's a widely held belief that garlic enhances immune system. I'll reuse the same links as my earlier "onion" question, but the purported mechanisms seem different, even if they are folded in the ...
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Do onions enhance immune system?

The claim that onions boost your immune system is pretty widely held. Examples: http://healthyeating.sfgate.com/onions-good-immune-system-3954.html ...
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Are sharks immune to almost all known diseases?

According to Did You Know.org: Sharks are the only animals that almost never get sick: they are immune to almost every known disease. Is this true or is it a myth?
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Is 70% of your immune system “located” in your gut?

A recent commercial for a particular brand of yogurt claims, among other things, that 70% of your immune system is located in your gut. I have seen this claim repeated here (the emphasis is mine): ...
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Is there a high risk of ASIA (Autoimmune Syndrome Induced by Adjuvants) from vaccinations? [closed]

Adjuvants are commonly used in most of the common vaccines and the idea behind them is to increase the effect of vaccine by further stimulating the immune system ...
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Do children who attend pre-school get sick less often when they start kindergarten?

For children who attend pre-school between the ages 2 and 4, do they tend to have better immunities (and therefore get sick less often) than elementary-school children who did not attend pre-school, ...
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Is eating boogers good for you?

Damn Interesting: There is an Austrian doctor who has gained notoriety by advocating the picking of one's nose and the consumption of the resulting bounty, particularly in children. Dr. Friedrich ...
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Is Autism in Children frequently due to low Glutathione Levels?

GlutathioneForHealth: Autistic children have 50% less intracellular glutathione than other children), which is why they have so much trouble detoxifing vaccines, medications, environmental toxins, ...
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Can optimism “boost” the immune system

Can your attitude (a positive outlook, optimism, "fighting spirit" etc, or the converse) influence how well your immune system works? Most research that confirm mood correlating with immune system ...
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Does living clean weaken ones immune system?

In many places I have heard that living too clean weakens your immune system. For example, a Daily Mail article says: Evidence is growing that dirt and germs can protect against disease - and that ...
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Does eating trans fatty acids affect immune response?

A viral message about margarine (seen in Is margarine "one molecule away from plastic"? ) claims [Margarine] decreases immune response. truthorfiction.com (no link - I'm not sure if ...
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Do children have “immature Immune Systems”?

In this answer to "Does regular handwashing with antibacterial soap prevent disease?", the responder claims: Daycares (children) are a slightly unusual situation: children put their hands in their ...
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Does stress weaken one's immune system?

This claim is very widespread, but I haven't seen it in any sources I'd consider trustworthy.
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Do hand sanitizers have a negative impact on the human immune system?

Related: Which is more effective at removing germs, washing with soap and water or using hand sanitizers? Does regular handwashing with antibacterial soap prevent disease? I've run across some ...
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Can mental state affect allergies?

I have heard see this sketchy reference that people with Multiple Personality Disorder, or other mental disorders, have different physical features when having different personalities. For example, ...
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Do “probiotics” have health benefits?

One of the only things that natural-food aficionados and food products mega-corporations agree on is that "probiotics" are good for you. I'm wondering if there is any reliable evidence to support the ...
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Are pediatricians immune to common communicable diseases?

This morning, our pediatrician cited "a study" where novice and seasoned pediatricians were tested for immunity to common communicable diseases (cold virus, strep bacteria, etc). He said that the ...
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Does excess sugar affect your immune system/inhibit vitamin C absorption?

There are lots of websites out there with domain names containing words like "healing" and "natural remedy" that suggest that your immune system can be affected by excess sugar. Others also suggest ...
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Does being cold increase your chances of catching the common cold?

"Everyone knows" - a scary statement - that you get "a cold" from being cold. Now it seems to be a fact that you don't, because you get a cold from a (rhino)virus, not from the temperature. But is ...
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Is it possible to “boost your immune system”?

I often hear claims that some activities, nutrients, ... "boost" your immune system. My understanding of the immune system is that it is a finely tuned machine with enormous destructive power. If ...