This is the seventh Dr Steven Dunbar thriller. The governments of the world know a terrorist biological attack will happen sooner rather than later. Vaccination is the only solution, but designing and producing vaccines has never been harder due to stringent trials, rules and regulations and huge settlements in an increasingly litigious society. There is no such thing as a 'completely safe vaccine' but necessity soon begins to outweigh caution and corners are cut, blind eyes turned and scientists given free rein with the new science of molecular biology. The only outcome can be disaster.