The 1918-1920 pandemic, dubbed the "Spanish flu," claimed 50 million lives. They also mention the figure of 100 million. During the spring of the second year of the "Spanish flu," people turned black and died on the second day after being ill. Returning home to America from the First World War, American soldiers brought the "Spanish flu." No vaccinations or masks existed, and the "Spanish flu" suddenly disappeared as it had appeared.