Think Outside The Pox: Vaccines Throughout History
On this week’s episode, we take a trip into the past to discuss the history of vaccines. We start with an overview of smallpox, a debilitating illness that has plagued humans for thousands of years, and how attempts to prevent smallpox resulted in the first rudimentary immunizations through the process of variolation. Over time, variolation evolved to the first instances of vaccinations, and we detail Edward Jenner’s famous accounts of using cowpox to immunize individuals against smallpox. From there, we discuss the rapid emergence of scientific advances regarding infectious diseases and vaccine technologies, tracking Pasteur’s and Koch’s work on Germ Theory of Disease and the development of rabies vaccinations. We summarize the progression and evolution of vaccines through the 19th and 20th centuries, highlighting some key examples. We discuss Diphtheria and the basis for toxoid vaccines, as well as the development of subunit vaccines which paved the way for the current vaccine technology era: using mRNA and viral vectors in vaccines. We wrap up with a summary of the global impact of vaccines, and how vaccinations have dramatically reduced the prevalence of illness and mortality of many infectious diseases around the world.
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