Dr. Michael Greger, physician and internationally-recognized expert on public health issues, delves into the origins of some of the deadliest pathogens the world has ever seen. Tracing their evolution from the past until today, Dr. Greger spotlights emerging flu and coronaviruses as he examines where these pathogens originated, as well as the underlying conditions and significant human role that have exacerbated their lethal influence to large, and even global, levels. As the world grapples with the devastating impact of the novel coronavirus 2019, or COVID-19, Dr. Greger reveals not only what we can do to protect ourselves and our loved ones during a pandemic, but also what human society must rectify to reduce the likelihood of even worse catastrophes in the future.