Explore the complex world of viruses, pandemics, and immunity in this 52-minute talk by immunology experts Arup K. Chakraborty and Andrey S. Shaw. Delve into the emergence of pandemics, the human immune system's response, and the development of diagnostic tests, vaccines, and antiviral therapies. Gain insights into how viruses enter the body, different virus types, mutation and recombination processes, and the innate and adaptive immune systems. Learn about COVID-19, the polio vaccine, and future vaccine developments. Understand the foundations of public health policies and the ongoing challenges in combating viral threats to humanity.