Immune System

Inside your body, there is a mechanism designed to defend you from millions of bacteria, microbes, viruses, toxins and parasites. Find out the different components and how the human immune system works.

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Learn More

'Man Flu' Could Be a Real Thing

Although women often think men exaggerate their symptoms when they have a cold or flu, a Canadian scientist has found that men are more susceptible to respiratory complications than women.

By Alia Hoyt Dec 12, 2017 Body Systems / Immune System

Sugars in Human Breast Milk Act as Antibacterial Agents

New research finds that nontoxic, antibacterial sugars found in human breast milk might be key to the next generation of antimicrobial drugs.

By Jesslyn Shields Aug 28, 2017 Body Systems / Immune System

Does mouthwash affect your immune system?

A swish of mouthwash after brushing makes our mouths feel fresh and clean. But some scientists think your mouthwash could be hurting your immune system. Is there something sinister lurking in your oral care routine?

By Jennifer Sellers Body Systems / Immune System

How Does Measles Reset Your Immune System?

Research shows that getting measles leaves you vulnerable to other infectious diseases until your body rebuilds its immunity, and that can take several years.

By Melanie Radzicki McManus Body Systems / Immune System

How Your Immune System Works

There are millions of bacteria, microbes, viruses, toxins and parasites that want to invade your body. And they'd happily do it, too -- if it weren't for your immune system.

By Marshall Brain Body Systems / Immune System