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प्रश्न
Explain how does vaccine work?
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उत्तर
A vaccine is a small quantity of a weakened antigen that is injected into the body of an individual. Once the antigen gets into the body of a healthy person, his/her body synthesises antibodies against the antigen. Once the body encounters an infectious antigen, it develops a memory; and when that antigen enters that body again, a large amount of antibodies is secreted by the body to destroy the antigen. Hence, it prevents the disease from occurring.
संबंधित प्रश्न
What are the immunisation programmes available at the nearest health centre in your locality? Which of these diseases are the major health problems in your area?
How many times did you fall ill in the last one year? What were the illnesses?
(a) Think of one change you could make in your habits in order to avoid any of /most of the above illnesses.
(b) Think of one change you would wish for in your surroundings in order to avoid any of/most of the above illnesses.
A baby is not able to tell her/his caretakers that she/he is sick. What would help us to find out
(a) that the baby is sick?
(b) what is the sickness?
Explain the methods of prevention of malaria.
"Prevention is better than cure". Explain.
What is an antibiotic? Give two examples
Name any two groups of micro-organisms from which antibiotics could be extracted.
Name any three diseases transmitted through vectors.
Explain giving reasons
A balanced diet is necessary for maintaining a healthy body.
Why do some children fall ill more frequently than others living in the same locality?
