Immunology

Vaccines & Immunization

A vaccine is a biological groundwork that affords active acquired immunity to a specific infectious disease. A vaccine naturally contains an agent who resembles a disease-causing microorganism and it is mainly made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins. The agent who will arouses the body's immune system to identify the agent as a threat, and will destroy it, and to further recognize and destroy any of the microorganisms associated with that harmful agent that it may encounter in the future. Vaccines will be prophylactic (which will prevent or ameliorate the effects of a future infection by a usual or "wild" pathogen), or therapeutic (which will fight a disease that has already occurred, such as cancer).

Immunization is the progression of injecting a vaccine to a person to defend them against harmful disease. Immunity (protection) by immunization will be alike to the immunity a person will get from disease, but instead of getting the disease you will get a vaccine. This is what makes vaccines such influential medicine. Furthermost vaccines are mainly given by needle (injection) but some of them are given by mouth (orally) or sprayed into the nose (nasally). Immunizations are also known as vaccinations, needles, shots or jabs.