Patient Zero (revised edition)Engrossing true stories of the pioneers of epidemiology who risked their lives to find the source of deadly diseasesnow revised to include updated information and a new chapter on Covid 19. More people have died in disease epidemics than in wars or other disasters, but the process of identifying these diseases and determining how they spread is often a terrifying gamble. Epidemiologists have been ignored, mocked, or silenced, all while trying to