What is the immune system?
The immune system helps to protect u against diseases caused bu tiny invaders (called pathogens) such as viruses, bacteria, and parasites. The immune system is made up of especially organs, cells, and tissues that all work together to destroy these invaders. Some of the main organs involved in the immune system include the spleen, lymph nodes, thymus, and bone marrow.
COVID 19 becomes serious for the people who have issues in organs such as the kidney because the immune system not work properly when some of our organs not functions properly.
How does the immune system work?
The immune system developed all kinds of cells that help destroy disease-causing microbes. Some of these cells are specially designed for a certain kind of disease. All throughout the body, disease-fighting cells are stored in the immune system waiting for the signal to go to battle. The immune system is able to communicate throughout the entire body. When pathogens are detected. messages are sent out, warning that the body is bein attached. The immune system then directs the correct attacking cells to the problem area to destroy the invaders.
How do we get immunity?
The immune system is very smart and adapts to new infections. Our bodies gain immunities in two ways: Natural and acquired.
Natural – When we are born, our bodies already have come immunity. Babies get antibodies from their mothers as they are growing in the womb. They may also gain some antibodies from their mother’s milk.
Acquired – Our bodies also learn immunities over time. When we get sick, our body learns how to fight off the disease. The next time that disease invades, our body is ready for it and can quickly produce antibodies to prevent infection. We can also gain immunity from vaccines.
What is an infection?
We are said to be infected when our body is invaded by harmful bacteria and viruses. These invaders multiply in our body cause many diseases. They can enter our body by various means.
They make an entry through the mouth when we eat contaminated food or drink dirty water or through lungs when we inhale air. We get these germs when we damage our skin by an insect bite or a cut. Household pests like flies, mosquitoes, rats, etc. often carry dangerous micro-organisms that can cause deadly diseases. Infection can be prevented by avoiding close contact with a sick person.
The things around us should be kept clean with a disinfectant and proper hygiene should be maintained.
Why are antibiotics important?
Antibiotics are a type of drug that is used to treat many diseases. These drugs attack micro-organisms like bacteria which cause many infections like tonsillitis and boils. Antibiotics damage the multiplying bacteria and are harmless to the human cells. Bacteria have a thick cell wall that can fight against our body’s defense mechanism.
They reproduce by dividing and re-forming their cell walls into new cells. The antibiotics stop this reproduction process of the bacteria by either killing them or weakening them so that they get destroyed by the body’s defense system. Penicillin was the first antibiotic to be destroyed by the body’s defense system. Penicillin was the first antibiotic to be discovered. Antibiotics work very well against all bacteria, but not against all viruses.
How does vaccination help us?
Vaccination provides immunity to our body to fight disease. It causes the body to produce antibodies, which fight against, foreign substances like bacteria and viruses. Vaccination uses killed or weakened germs which are harmless to us. These antigens or germs enter our body through an injection or an oral dose.
Our body reacts against these antigens and produces antibodies. This makes the body ready to combat in case it is attacked by these antigens naturally. Sometimes, booster does or further vaccination is required to provide continuing protection against vaccination.