Active immunity

All of us were aghast to hear or even read reports of previous viral epidemics that have plagued different countries. Their ability to cause damage to the body is very serious indeed. Nevertheless, doctors are in constant search for ways to combat these viruses.

Active immunity

By Editors Active Immunity Definition An active immunity is Active immunity resistance to disease through the creation of antibodies by the immune system.

Passive immunity - Wikipedia

As opposed to passive immunitywhere antibodies Active immunity injected into an organismactive immunity requires a process of training immune cells to recognize and counteract foreign bodies. Typically, a bacteria or virus enters an organism and starts causing damage through its reproductive activities.

Active immunity

The damage being done to cells releases a signal to immune cells that something is wrong. The immune cells surround the foreign bodies and digest them, to remove them from the organism.

At the same time, the immune system learns how these bodies present themselves, and prepare antibodies, or proteins meant to encapsulate and identify these foreign organisms.


To do this, certain cells in the immune system respond to proteins on the surface of bacterial cells, viruses, and other foreign bodies. By analogy, if the foreign body antigen is a protein key, the immune system can create a protein lock into which the key fits perfectly.

To quickly encapsulate and identify many foreign bodies at once, numerous antibodies are released by the immune system. They travel through the blood stream into various parts of the body, helping the immune system find and digest foreign invaders.

In an active immunity, resistance to a disease can be carried on for a long time.

Active Immunity Definition

Once the immune system has learned to produce an antibodyit can do so repeatedly. Some of the antibodies produced by the immune system can be attached to immune cells that search through the body for foreign invaders.

This type of active immunity is much more effective in the long run in resisting disease, especially if the first infection is survivable. Subsequent infections will be much less dangerous, because the active immunity will mean the disease gets eradicated before it can cause severe damage to a large number of cells in an organism.

A vaccine-induced immunity is a type of active immunity in which the initial infection is produced by the injection of a dead virus or dead bacteria into a person. Although commercially produced vaccines are produced by much more complicated and stringent standards, the process is the same as the following.

But, they must be left somewhat intact, so that the antigens, or proteins they present on their surfaces, can still be recognized by the immune system. A serum containing these dead foreign bodies is injected into a live organism. The immune system reacts to the foreign bodies, and creates an active immunity against the presented antigens.

When you are subsequently infected by the actual organism, your body quickly recognizes the antigens present and destroys the organism before it has the chance to reproduce and wreak havoc on your body. There are some unfortunate cases in which an active immunity can start to target cells of your own body.

Active immunity

The continual immune response to your own cells is known as an autoimmune disease. Typically, the immune system only functions to protect you, but it is import to know that in certain cases, it can be a detriment.

Examples of Active Immunity Smallpox Immunity in Cow Maidens The development of the first successful vaccine, back in the s, was an enormous advance to medical science made possible by Edward Jenner. Jenner observed that cow maidens had a peculiar resistance to a terrible disease that was becoming epidemic.

The cow maidens, having been exposed to the animal form of smallpox known as cowpoxwould not show the dramatic symptoms of most patients. Typically, smallpox would present itself with small boils all over the body. The cow maidens did not show these symptoms.


Their resistance to the disease was provided by the active immunity they received to smallpox. The cowpox virus, being related to the smallpox virus, has a similar shape, and also similar antigens. The cow maidens, being exposed to a cow with cowpox, would often catch the virus themselves.

Unlike smallpox, cowpox has a much higher survival rate and less brutal symptoms. The immune system would learn to produce antibodies to the cowpox antigen in this infection.Related to active immunity: passive immunity, natural immunity, artificial passive immunity, artificial active immunity, artificial immunity Immunity Exemption from performing duties that the law generally requires other citizens to perform, or from a penalty or burden that the law generally places upon other

Immunity is the name given to the body's set of defenses to protect against pathogens and combat infections. It's a complex system, so immunity is broken down into categories. Immunity is the body's set of defenses used to prevent and combat infection.

SEBASTIAN KAULITZKI / . Active immunity definition: immunity (to a disease) due to the production of antibodies by the body | Meaning, pronunciation, translations and  · Active immunity is developed by being exposed to disease or to vaccination, and as a result person’s body developing its own immune response (e.g.

protective antibodies in the blood.) As a result, person’s ability to fight the same condition with Immunity resulting from the development of antibodies in response to the presence of an antigen, as from vaccination or exposure to an infectious disease.

The natural immune response to an antigen by infectious exposure or inoculation, resulting in the formation of specific antibodies and protection.

Active immunity definition, immunity in an organism resulting from its own production of antibody or lymphocytes. See more.

Active immunity: Synonyms in English