Disease: ** is a departure from normal health due to structural or functional disorder of the body. ** may be due to deficiency of nutrients or malfunctioning of organs or 1 genetic disorders, improper metabolic activity, or allergies, or ** and mental illness as diabetes, haemophilia, leukemia, schizophrenia.
Immunisation: It means, we make the body immune to certain **** by introducing respective weakened germs into the body. Thus we develop resistance to the concerned ** this process is called immunisation. The germs or the material introduced into the body to make it resistant to the concerned ** is called vaccine. This produces antibodies in the body of the person and the person can be saved by these antibodies. The vaccine can be given by the injection or orally as polio drops, tap vaccine for typhoid, BCG vaccine for tuberculosis.
Pathogens: The germs that cause **** to human beings and to other animals and plants are called pathogens. They spread the **** from person to person or through the air or through the articles of the diseased persons. Pathogens may be different kinds of bacteria, viruses, fungi, protozoans or worms.
AID’ (Acquired Immune Deficiency Syndrome): It is a viral ** caused by the virus called (Human immuno deficiency virus) This virus makes the defence mechanism of the human body very weak. The immune system in the body as W.B.C. becomes weak. Thus the person catches the infectious **** very easily. This ** spreads through ** contact as one of the partner may be carrier of the **. It may spread through the blood transfusion and infected syringes, blades of the barbers, it may infect the developing baby through the blood by the mother. It is very deadly **.
Vaccination: Vaccination is a method of making the body immune to a particular ** by injecting or weakened ** causing microbe into a body to stimulate the formation of antibodies and develop immunity to that *** causing microbe.
Vector: A vector is an organism that carries *** causing microbes (pathogens) from one host to another. They are the carriers of infection. Example: Mosquito, housefly, etc.
