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Active immunity
By active immunity, we generally understand the resistance that our immune system shows against pathogens.
By the so-called 'clonal selection', enough antibodies are built up in order to help our organism fight off colds or different diseases.
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Active immunity features
- The need to be exposed to a pathogen or to the antigen of a pathogen, which leads to the production of antibodies
- The cells involved are of three types: T cells, B cells and anti-presenting cells
- Immunity is acquired after severa...
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Immunity categories
There are several immunity categories:
- Nonspecific defenses: these work against all foreign matter and pathogens
- Specific defenses: these are specialized in fighting against particular threats
- Innate immunity: natu...
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Our Immunity
Immunity is defined as the set of defenses, that our bodies possess, which has the role to protect us against pathogens and to fight against infections.
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Passive immunity
Passive immunity refers to the creation of immunity by introducing antibodies from outside the organism, such as the injection of antivenom after having been bitten by a snake.
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Passive immunity features
Among the features of passive immunity, the most known are:
- This type of immunity does not require exposure to antigen or to an infectious agent
- The response to an infectious agent is immediate
- The immunity is effective on s...
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Adaptive Immune System: Tailored Defense with Memory for Long-Term Immunity
The adaptive immune system is highly specialized and tailored to recognize specific pathogens. Unlike the innate immune system, which responds immediately but generally to threats, the adaptive system remembers past invaders and prepares the body for stronger and quicker ...
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