SHAPE-SHIFTER
It’s a nightmare almost impossible to imagine, especially given today’s advanced science: Just 100 years ago, a deadly flu swept the world, killing 50 to 100 million people in only about a year — up to 5 percent of everyone on Earth. Gone, just like that! To put those numbers in perspective, World War I killed about 18 million people, and World War II about 60 million, notes Laura Spinney in her article about the 1918 Spanish flu pandemic (page 34). This was before we had vaccines or even really understood what caused diseases and how they were transmitted. Many people believed that if you got sick, you kinda deserved it: “It was common for privileged elites to look down on workers and the poor as inferior categories of human being, whose…