Vaccines, Vaccination and Immunization

Vaccines against Infectious Diseases

Infectious diseases are disorders caused by organisms such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful, but under certain conditions, some organisms may cause disease. Vaccines are a way of artificially activating the immune system to protect against infectious disease. Of those various diseases, maybe none is a lot of common than infectious diseases, that area unit outlined by UN agency as any morbific organism that may be unfold directly or indirectly from one person to a different. Stimulating immune responses with an infectious agent is known as immunization.