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The Human Immune System (HIS), Parts and Antibiotics

The Human Immune System (HIS) is a portable, self-contained and self-powered surveillance device capable of mapping any biological threat in space, allowing for remote observation of real time growth and evolution.

Our immune system is our invisible protection against everyday bacteria and viruses. Unsung heroes like microglia, macrophages, and T-cells are constantly on guard, staying vigilant for signs of infection or other invaders.

What is the Human Immune System?
The immune system protects your child's body from outside invaders. These include germs such as bacteria, viruses, and fungi, and toxins (chemicals made by microbes). The immune system is made up of different organs, cells, and proteins that work together.
The immune system and microbial infection
The immune system keeps a record of every microbe it has ever defeated, in types of white blood cells (B- and T-lymphocytes) known as memory cells. This means it can recognize and destroy the microbe quickly if it enters the body again, before it can multiply and make you feel sick.
Some infections, like the flu and the common cold, have to be fought many times because so many different viruses or strains of the same type of virus can cause these illnesses. Catching a cold or flu from one virus does not give you immunity against the others.

Parts of the immune system
The main parts of the immune system are:

  • white blood cells
  • antibodies
  • complement system
  • lymphatic system
  • spleen
  • bone marrow
  • thymus.

An infection can be seen as a battle between the invading pathogens and the host. Our bodies are equipped to fight off invading microbes that may cause disease. These are called our natural defences.

How do antibiotics help fight infections?
Antibiotics can be used to help your child's immune system fight infections by bacteria. But antibiotics don’t work for infections caused by viruses. Antibiotics were developed to kill or disable certain bacteria. That means that an antibiotic that works for a skin infection caused by a certain bacteria may not work to cure diarrhea caused by a different bacteria. Using antibiotics for viral infections or using the wrong antibiotic to treat a bacterial infection can help bacteria become resistant to the antibiotic so it won't work as well in the future. It's important to take antibiotics as prescribed and for the right amount of time. If antibiotics are stopped early, the bacteria may develop a resistance to the antibiotics. Then the infection may come back again and be harder to treat.


The human immune system is the body's defenses against infections and illness. It protects from invasions of disease-causing organisms and work to remove pathogens that have reached an infection site... The immune system protects the body against infection and other diseases, but not all bodies are protected equally.

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