The immune system is a defence system for the body. It has two main forces that work together to keep "germs" (pathogens like viruses and bacteria) from making you sick.

1. The General Fighting Force (Innate Immunity)

This is the general defense force we are born with. It is fast acting and non-specific first line of defense against all germs. It uses three main defence strategies.

Barriers:
Your skin and mucous membranes act as physical barriers to block invaders.

Constant Vigilance: Special white blood cells called phagocytes (like macrophages and neutrophils) act as hunters. They roam the body and consume any foreign substance that doesn't belong.

Inflammation:
If a pathogen breaks through, the body will send extra blood to the area, causing swelling and heat. This makes it easier for more defense cells to arrive before the pathogen can establish a full infection

2. The Elite Fighting Force (Adaptive Immunity)

The elite fighting force will take over when the general force can't handle the threat. It is slower to start but much more precise. Identification: It uses antigens—unique markers on the surface of germs—to identify exactly which enemy it is fighting.

Intelligence (B Cells): These cells create antibodies, which are custom-made proteins that lock onto specific germs like a key in a lock. This disables the germ and "tags" it for destruction.

The Soldiers (T Cells): Some T cells (killer T cells) hunt down and destroy your own cells that have already been hijacked by a virus.

3. Memory

The adaptive system remembers. After a threat, some cells stay behind as "memory cells". If the same germ ever tries to come back, these cells recognize it instantly and wipe it out before you even feel sick. This is exactly how vaccines work—they give your body a "training" version of the germ so it can build memory without you getting ill first. Transfer Factors are these memory molecules that support your immune system. Click Immune System Supplements UK Study Results for more information..