Threat to the Vatican

The Ebola virus is rife in some African countries, but is this connected in any way to a threat to the Vatican? Tom Ranswick and a Chinese agent are deliberately infected with a new strain of Ebola and their lives are in great danger. Jake Brown, whilst recuperating in Rome, finds that a terrorist mastermind is also there, but why? He is not a man known to take holidays. Can the world's security agencies come together to stop a devastating ISIS-led threat, originating in West Africa?