History Of Bubune System And Vaccination

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There was a time when it wasn’t uncommon for someone to die from smallpox, polio, bubonic plague, pertussis, measles, or diphtheria. Bubonic plague wiped out approximately one third of the population of Europe between the years 1347 and 1351, leaving whole towns abandoned and causing mass hysteria. In the year 1520, Spanish conquistadors brought Old World diseases to the Americas, and smallpox decimated the native population to the point of near-extinction. During the 1940s and 1950s, hundreds of iron lungs were in use at hospitals as polio ravaged the modern world, and the survivors were often left crippled and unable to walk because of the disease. The devastation was immense during these outbreaks. People buried friends and family, and were …show more content…
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

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