Understand the facts and issues surrounding HIV and AIDS by creating a newspaper supplement containing information gathered from research.

Will the body's defense system fight off the foreign invader? Animated cartoon characters explain the human body's immune system in action. [8:30]

Hank tells us about the team of deadly ninja assassins that is tasked with protecting our bodies from all the bad guys that want to kill us - also known as our immune system. [15:02]

Find out how the immune system's responses begin with physical barriers like skin and mucous membranes, and when they're not enough, there are phagocytes, the neutrophils, and macrophages. It also features the natural killer cells and...

View this 3D medical animation to learn how HIV affects the immune system and causes AIDS. [6:52]

Can being cold give you a cold? Learn what is really happening in your body when you get chilled.

Every second of your life you are under attack. Bacteria, viruses, spores and more living stuff wants to enter your body and use its resources for itself. The immune system is a powerful army of cells that fights like a T-Rex on speed...

A video illustrating how immune cells work in the human body. [7:26]

Paul Andersen explains how your body protects itself from invading viruses and bacteria. He starts by describing the nonspecific immune responses of skin and inflammation. He then explains how we use antibodies to disrupt the function of...

Rich-media overview of allergies includes a short narrated video animation of how the immune system reacts to allergens. [2:24]

Learn about the human body's second line of defense against pathogens, innate immunity. [5:24]

Understand the role of phagocytes in innate or nonspecific immunity. Neutrophils, macrophages, and dendritic cells. [16:20]

Learn about innate and adaptive immunity; humoral adaptive immunity and cell-mediated adaptive immunity. [8:06]

Learn about viral replication: Lytic vs Lysogenic. [5:11]

Understand the difference between self and non-self immunity. [14:28]

A video [11:31] explaining HIV/AIDS and how it affects the cells to attack the immune system.

This Khan Academy resource, created by Jeff Otjen is a video that describes the condition allergic rhinitis.

Sal Khan discusses our immune system responses, specifically humoral adaptive immunity. [8:06]

Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for...

Visit us (http://www.khanacademy.org/science/healthcare-and-medicine) for health and medicine content or (http://www.khanacademy.org/test-prep/mcat) for MCAT related content. These videos do not provide medical advice and are for...

This video describes how viruses replicate in cells. [5:10]

Learn how vaccines help the immune system protect people against diseases in this video. [3:37] The immune system is a natural defense system that uses biological processes to fight invaders such as germs. Vaccines introduce a weakened...

Learn what happens in the body during anaphylactic shock. [8:29]

The infamous Wakefield study kickstarted the Autism Myth, but many studies have since shown that there is no link between the MMR Vaccine and autism. Find out how it all got started. Rishi is a pediatric infectious disease physician and...