Do You Know How Active and Passive Immunity Work to Keep You Healthy? - Deepstash

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Our Immunity

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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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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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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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: natural immunity that protects one from birth until death
  • Acquired immunity: it is the third line of defense, which offers protection against specific types of pathogens.

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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 several exposures to the antigen
  • Active immunity can last up to an entire life
  • This type of immunity can cause at most some autoimmune disease and allergies, however, there are no issues generally.

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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 short term
  • The so-called 'serum sickness' is one of the effects of the exposure to antisera.

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