Describes the 1918 influenza (sometimes called the Spanish influenza), explaining the causes of the disease, how it affects the body, and how it became a pandemic.

"The deadly outbreak of plague known as the Great Mortality, which struck Europe in the mid 1300s and raged for four centuries, wiped out more than 25 million people in the course of just two years. With its vicious onslaught, life changed for millions of people almost instantaneously. Deadly pandemics have always been a part of life, from the Great Mortality of the Middle Ages, to the Spanish Influenza outbreak of 1918, to the eruption of COVID-19...