getting sick because the immune system gets used to fight to similar things so every time they get better and better so they get stronger.
lymphatique system
The immune system
The immune system
Your immune system. The healthier your immune system is, the more likely you will be able to fight off infections and diseases. Antibodies are proteins in the blood that fight disease. - DLW
immune system
your body has white blood cells which are built up into a immune system these fight the diseases and vaccines boost the system.
It hinders the immune system's ability to fight of diseases and viruses in the body.
Your immune system or your live, but you have to have healthy liver to filter out all your diseases.
The immune system, primarily.The immune system.Really...
Your immune system. The healthier your immune system is, the more likely you will be able to fight off infections and diseases. Antibodies are proteins in the blood that fight disease. - DLW
white blood cells
Your immune system. Your immune system has a certain amount of "buffer" against diseases, but your body also builds anti-bodies against diseases after it has come into contact with a virus, etc the first time, so that it can fight it if you ever get it again.