Do vaccines completely protect you from diseases?If you get vaccination shots, would you still have a chance to be exposed to a disease? (is the...

Immunization, also called vaccination, a method of strengthening the body resistance against specific diseases using microorganisms - bacteria or viruses - which have been changed or killed. These microorganisms do not cause disease treated, but stimulates the body's immune system to create a defense mechanism that protects against disease continuously. If the protected person against a particular disease contacts  the agent that causes disease, the immune system is able to respond immediately against the disease.

Immunization reduced the amazing number of people dying from a fatal disease. Scientists have discovered two types of immunization: active immunization, ensuring greater period of protection against disease, and passive immunization, ensuring temporary immunization.

 In active immunization, some or all micro-organism that causes disease or as a product of the same product is injected into the body to make immune system to resist disease.

Vaccines that produce active immunization are made into several types depending on the type of disease and the body it causes.

Vaccine components are antibodies, substances found in the body that cause disease, so that the immune system recognizes them as foreign. In response to the antibodies, the immune system creates antibodies or other white blood cells called lymphocytes. Immunization mimics real infection, but have little or no risk of infection with the disease.

Passive immunization is the injection of blood from a person or an animal actively immunized.

Some agents in vaccines provide complete protection against the disease throughout life.

Some agents offer partial protection, ie the vaccinee may contact the disease, but to a less severe form.

Vaccines are considered risky for people who have an immune system partially destroyed, such as those infected with the virus that causes immunodeficiency syndrome or AIDS, or those which are chimo therapy for cancer or those awaiting an organ transplant.

Some vaccines need to be repeated at specified intervals. Tetanus injections, for example, are recommended every 10 years throughout life.