Boots WebMD Partners in Health
Return To Boots

Healthy eating health centre

Immune system directory

Your immune system is a complex network of cells, tissues and organs that play a protective role in the body. It defends against threats such as bacteria, viruses, fungi, and parasites. This is known as the immune system response because it triggers a set of reactions and responses. In autoimmune diseases, the immune system targets the wrong enemy, resulting in conditions that include allergies, some types of arthritis, and psoriasis. There are two parts of the immune system - the innate protection we have since birth, and the protection we develop over time with exposure to certain bacteria and illnesses. Your immune system can be damaged or compromised by diseases such as cancer. Follow the links below to find BootsWebMD's comprehensive coverage about the immune system and much more.

Medical reference


Thumbnail: Exercising when unwell: A good idea?

You’re not feeling your best. Should you exercise when unwell or opt out? Here are some tips on how to decide.

Read full article

Slideshows & images

Stay informed

Sign up for BootsWebMD's free newsletters.
Sign Up Now!

Popular slideshows & tools on BootsWebMD

How to help headache pain
rash on skin
Top eczema triggers to avoid
Causes of fatigue & how to fight it
Tips to support digestive health
woman looking at pregnancy test
Is your body ready for pregnancy?
woman sleeping
Sleep better tonight
Treating your child's cold or fever
fifth disease
Illnesses every parent should know
spoonfull of sugar
Surprising things that harm your liver
woman holding stomach
Understand this common condition
What your nails say about your health