The most incredible scenarios of saving humanity from a terrible catastrophe that can surpass the consequences of influenza, called the most massive pandemic in the history of humankind "Spanish" in the early 20th century, are offered. Then the victims of the war itself reached 20 million people. The death toll from the pandemic far exceeded the official 50 million. In November 1918, the First World War ended. American soldiers were loading on steamships and went home to America. They brought a "Spanish" with them. The epidemic did mostly hit young. Immunity battling the disease caused a powerful and potentially dangerous reaction of the organism that kills the infection, simultaneously destroying the entire body.