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Nisationib) Define Vaccine. c) What type of diseases can be prevented through vaccinatA girl puils a trolley at: wie urciley moves through a distance. The girl has exacted a force on the trolley anddisplaced. Thårefore, work is done Work done by a force acting on an object is equal to the magnitude of the fmultiplied by the distance moved in the direction of the force. The unit of force is 'Newton' and the displacememierAnswer the following questions:-a) Write the two conditions necessary to do work.b) Define 1 Joule of work.c) A porter liits a luggage of 15 kg from the ground and puts it on his head 1.5 m above the ground. Calculate thek done by him on the luggage.How can we separate:- |
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Answer» Answer: Immunization is the process whereby a person is made immune or resistant to an infectious disease, typically by the administration of a vaccine. VACCINES stimulate the body’s own immune system to protect the person against subsequent infection or disease. This happens because when the immune system first sees an infectious microbe, it responds against it and then remembers it SPECIFICALLY. So the next time that particular microbe, or its close relatives enter the body, the immune system responds with even greater vigor. This eliminates the infection even more quickly than the first time AROUND. This is the BASIS of the principle of immunisation. |
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