Pandemic

When an unidentified, seemingly healthy young woman collapses suddenly on the New York City subway and dies upon reaching the hospital, her case is an eerie reminder for veteran medical examiner Jack Stapleton of the 1918 flu pandemic. Fearful of a repeat on the one hundredth anniversary of the nightmarish contagion, Jack autopsies the woman within hours of her demise and discovers some striking anomalies: first, that she has had a heart transplant, and second, that, against all odds, her DNA matches that of the transplanted heart.