Bailey Cove Evening: Last Town on Earth by Thomas Mullen

Set in 1918, with World War I raging in Europe and a deadly flu epidemic spreading to and through America, this is the story of a town that decides to take its fate into its own hands. The committee members of the Washington town of Commonwealth decide to set up an armed outpost to prevent those infected with influenza from getting in. Young guards Graham, a mill worker, and Philip, the 16-year-old adopted son of the mill owner, reluctantly murder a soldier from a local fort who tries to force his way in. A few days later, a second soldier attempts to gain entry. Philip, alone this time, can't shoot the man, and the youth and soldier end up quarantined together. Yet despite the town's precautions, the plague arrives and wreaks graphically depicted havoc.