terrorists use spanish flu virus from russian ww1 soldier

The provocative story of Cole, a time traveler from a decimated future in a high-stakes race against the clock. Utilizing a dangerous and untested method of time travel, he journeys from 2043 to the present day on a mission to locate and eradicate the source of a deadly plague that will all but annihilate the human race.

In April 1918, a disease of unknown origin swept across the five continents. In 18 months, millions of lives that had not been taken by the war were swept away by a virus that would cause the worst pandemic in history: the Spanish flu.

In Spain, the worst known pandemic decimated the population, with 80% mortality among children. Spain was half empty. There are documents from the time that give us testimony, but why do we hardly know anything about this "Spanish flu"? Surely his study and knowledge would have helped us correct errors in later pandemics.