Vaccination Protects the Human Body from Certain Diseases

Vaccination is a procedure by which certain antigenic material is introduced into the body. The goal of vaccination is to create immunity to a certain disease. Vaccinations are considered to be the most effective and cheapest method of preventing the appearance and spread of infectious diseases. The vaccine may contain live but attenuated pathogens of bacteria or viruses, dead or inactivated pathogens, or only isolated specific proteins of the given pathogens. Smallpox was the first disease that people tried to prevent by vaccinatio