At the Edge of Mysteries

THE JOURNEY OF THE PIONEERS OF IMMUNOLOGY FROM SMALLPOX TO COVID-19 In December 2019 a new virus emerged, one that caused a global pandemic. Millions were infected. In the recesses of their fragile bodies a battle raged: between the immune system and the virus. But what is the immune system? What are its components? How do they work? One way to understand this system, arguably the most complicated in human physiology, is by walking in the footsteps of history, one observation and experiment at a