Conspiracy of Silence (The Tox Files)

This Is the Way the World Ends.
Four years after a tragic mission decimated his team, Cole "Tox" Russell has been disavowed by the United States. And that's fine--he just wants to be left alone. But when a dormant, centuries-old disease is unleashed, Tox is lured back into action.
Tox and his former Special Forces team regroup to work with FBI deception expert, Kasey Cortes, and fiery archaeologist, Tzivia Khalon, to search the globe for answers--and a cure. As the mission leads from one continent to another, it becomes clear they're not just fighting a plague but battling an ancient secret society whose true goals remain hidden.
With time running out and the threat for a global pandemic rising, Tox and his team realize their sole chance might be to reach back through centuries of silence to find the only answer that can save them all.