Question
Here are four steps that show the process of IMMUNISATION. Which happens LAST? The presence of the pathogen stimulates an immune response If the pathogen re-enters the body, the white blood cells "remember the correct antibody to produce - preventing infection A small quantity of dead or inactive forms of the pathogen are introduced to the body White blood cells produce antibodies to the pathogen
Answer
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Yves
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Answer
If the pathogen re-enters the body, the immune system's white blood cells "remember" the correct antibody to produce - preventing infection
Explanation
Immunisation is a biological mechanism to induce an immune response against potential pathological entities such as viruses and bacteria. The process involves the following steps:1. A small quantity of dead or inactive forms of the pathogen are introduced to the body. This initiates the immune response.2. The body's white blood cells produce antibodies to identify and neutralise the pathogen.3. The presence of the pathogen stimulates the immune system further and enhances the immunological memory.4. If the pathogen re-enters the body, the immune system's white blood cells "remember" the correct antibody to produce, preventing the infection from causing harm. Thus, memory creation and pathogen re-entry induced response indeed happens last in this four-step immunisation process.