Never Miss by Melissa Koslin

Former CIA sniper Kadance Tolle possesses a special set of skills and a rare pedigree. She comes from a family of assassins, and by saving Lyndon Vaile’s life she risks being found by them. Despite the danger, Kadance feels compelled to help Lyndon discover who is after him–and his research that seems to prove that the Ebola virus was manmade and is about to be weaponized.

With shadowy figures pursuing them and a Mastermind watching their every move, Kadance and Lyndon must scramble to stop an impending bioattack at the State of the Union address. But their warnings fall on deaf ears, and it becomes increasingly clear that there’s no one they can trust–except perhaps each other.