In 1918, the first pandemic killed over 500,000 Americans and more than 20 million people world-wide. Pandemics in 1957 and 1968 killed tens of thousands of Americans and millions across the world. Scientists believe that viruses from birds played a role i
In 1918, the first pandemic killed over 500,000 Americans and more than 20 million people world-wide. Pandemics in 1957 and 1968 killed tens of thousa...
