According to this argument, it has been America's lack of consistency in its relations with allies and foes alike, and its sporadic attention to places such as the Middle East, that have allowed virulent anti-Americanism to fester.

ECONOMIST: America's place in the world

Such thoughts may have been fuelled by a virulent recent press campaign in France against Mr Strauss-Kahn's wealthy lifestyle, with details of his and his wife's swanky properties in Marrakech, Paris and Washington.

ECONOMIST: Dominique Strauss-Kahn

In early tests researchers have stopped the growth of the most virulent human tumors, varieties accounting for 25% of cancer deaths.

FORBES: Magazine Article

Stefansson overcame virulent objections that one company shouldn't have such sweeping access and won permission for the database, now under construction.

FORBES: The E-Gang: Medical Marvels

Half of the victims have been hospitalised, a high rate that may indicate an especially virulent strain of E. coli.

ECONOMIST: Those healthy green leaves cause a terrible scare

At risk is the life of Rifqa Bary, the seventeen-year-old girl who fled to Florida in July to escape her family and the virulent Muslim community near Columbus, Ohio of which they have been a part since immigrating from Sri Lanka.

CENTERFORSECURITYPOLICY: Death sentence? The FDLE Report

Even the most virulent pathogens encountered in the real world (say, Ebola or HIV) have infection rates below 50%.

WSJ: Why Zombies Are Everywhere