History Of Bubune System And Vaccination
The human immune system is essential to protecting the human body from infection. It detects and attacks various agents that cause disease, and is made up of various specialized cells, tissues, and organs designated to fight infection. The adaptive immune system is specifically designed to respond to pathogens and other disease causing material, and has the benefit of immunological memory. This means that after a potentially dangerous antigen or pathogen has been recognized and attacked by the T and B cells of the immune system, the body will “remember” that pathogen or antigen and the immune system will be able to kill that threat in a quicker and more efficiently. With a faster and more efficient response, symptoms are oftentimes nonexistent as the immune system neutralizes the potential danger. This is known as acquired immunity, and is the reason why it is extremely rare to contract diseases such as chicken pox more than once; the immune system recognizes the threat and disposes it before the damage can be done (Alberts).
Vaccines help to provide acquired immunity without inducing the actual disease or infection. They inject synthetic, or sometimes dead viruses, into the body to train the immune system to recognize various diseases. The immune system is then able to identify and rid the body of harmful pathogens and antigens without experiencing the symptoms of the disease that the vaccine is designed to protect the body against (Centers for Disease Control and