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Immunization

Immunization, or immunisation, is the process by which an individual's immune system becomes fortified against an infectious agent (known as the immunogen). When this system is exposed to molecules that are foreign to the body, called non-self, it will orchestrate an immune response, and it will also develop the ability to quickly respond to a subsequent encounter because of immunological memory.

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Adaptive immune system

The adaptive immune system is one of the two main branches of the immune system, alongside the innate immune system.

Antibodies

Antibody

An antibody, also known as an immunoglobulin, is a large Y-shaped protein produced by the immune system to neutralize pathogens such as bacteria and viruses.

Antigen

An antigen is a substance that triggers an immune response in the body.

Attenuated vaccine

An attenuated vaccine (or a live attenuated vaccine, LAV) is a vaccine created by reducing the virulence of a pathogen, but still keeping it viable (or "live").

Cancer

Cancer is a broad term used to describe a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body.

Cell (biology)

The Wikipedia page for "Cell (biology)" provides an extensive overview of the fundamental unit of life - the cell.

Centers for Disease Control and Prevention

The Centers for Disease Control and Prevention (CDC) is a national public health agency in the United States.