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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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.

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.

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.
  • 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.

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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Bizarre Claims
  • Antioxidant pills do kill bacteria and viruses but also damage healthy cells, leading to wearing out of the immune system and even cancer. No study so far has given compelling results in favor of antioxidants boosting the immune system or treating viral infections.
  • Stuff with live microorganisms like probiotics and kombucha is doing the rounds in the news with claims of curing the new virus, cancer, and AIDS. One study did show that probiotics reduce upper-respiratory-tract infections, but more evidence is needed.
  • Claims of masturbation improving our immunity or protecting us from the new virus are untrue.

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IDEAS

The immune system does an outstanding job most of the time. To provide such excellent protection against bacteria, viruses, parasites, and fungi, our immune system must continuously learn.

The 7 Identified Virus Families

Scientists to date have identified seven virus families that cause the majority of colds:

  • rhinovirus
  • the new 2019
  • influenza
  • parainfluenza
  • adenovirus
  • respiratory syncytial virus (RSV)
  • metapneumovirus.

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