Antonio Lazcano (Mexico) is a biologist, a Doctor of Science from UNAM, and expert in the origin and early evolution of life. He has lectured and been a visiting scientist at universities in the Americas and Europe and has received national and international awards. He also has three honorary doctorates and has been a member of the National College since 2014. He is the author of around 150 research papers and numerous books, including Tres ensayos darwinistas (2016), in which he invites the reader to meet one of the great scientists, focussing on three major topics: natural selection, inheritance and the origin of life. At this event, Lazcano will give a lecture about a true watershed in the history of medicine, science and human life: vaccinations.