Norovirus spreads easily via contaminated food or drinking water, but a more insidious route is from a person touching a surface contaminated with the residue of stool or vomit from an infected person and then touching his or her mouth before hand-washing.
Overleaf, we follow the fortunes of Homo sapiens sapiens around the Black and Mediterranean Seas through 30 000 years of a tumultuous history marked by sporadic earthquakes, tsunamis and volcanic eruptions, as well as more insidious hazards tied to a changing climate, such as flooding from glacier melt, gradual sea-level rise or prolonged drought.
But what may be the most insidious battle is hardly a blip on most radar screens.
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"It's a very insidious practice, " AMD President Dirk Meyer said in an interview with Forbes.com.
It also has far more boys than girls--a rather insidious problem.
Cyberbullying, which has received the most attention of late, may represent a particularly insidious form of abuse, partly because it can occur anywhere and anytime, says Dr. Victor Fornari, the director of child and adolescent psychiatry at the North Shore-Long Island Jewish Health System, in New Hyde Park, New York.
The huge gap between job openings and jobless numbers suggests something insidious and possibly structural: a talent crunch.
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The immeasurable side effect of all this is perhaps the most insidious of them all: a loss of confidence in financial institutions.
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"There is no doubt that he was the victim of an insidious form of abuse involving a grave breach of trust and that he has suffered significantly as a result, " she said.
Sierra Leone's status as a model for post-conflict recovery has had an insidious effect on its bureaucrats, many of whom waste a lot of time inveigling themselves into delegations to conferences and seminars abroad, where they receive handsome allowances.
But, while that may be like shooting an elephant with a BB-gun, the Mayor is taking a shotgun to a far more egregious and insidious influence peddling tactic.
Anti-dumping duties are a more fashionable (and more insidious) form of protectionism these days.
Behavioral errors, such as a dieter irrationally eating a box of doughnuts, are more insidious since they are rooted in deep-seated human behaviors.
From my perch as a coach, I see boredom as an insidious, undermining influence in companies.
"Americans still cite privacy as one of the core values they cherish, but what's happening is this slow, insidious erosion of it, " said Jonathan Turley, a law professor at George Washington University.
Lack of sleep can affect reaction times leading to work injuries, but a lack of sleep affects you in some more insidious ways as well.
Tourism became an insidious influence on the debate between the party that wanted Venice to be a creature of its past which concentrated on conservation and restoration, and those who preferred to improve the quality of life even if that meant changing the face of the place.
As Eric Hobsbawm has said, terrorism is a new kind of urban pollution, and the pollutant is an insidious and chronic disquiet.
It may be a negotiating bluff, designed to facilitate acquiescence to less outlandish, but still-insidious demands.
Rising numbers of urban workers and the insidious spread of Anglo-Saxon fast-food habits are working against the old traditions of a glass with breakfast followed by a long lunch fuelled by a bottle or two.
Pilots say those stalls are particularly insidious because pilots cannot see the tail wings and because the recovery procedure is the opposite of a main-wing stall -- tail-wing stalls generally are overcome by raising the plane's nose.
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There are also more insidious effects: Many narcoleptics experience vivid hallucinations while falling asleep, and between 60% and 90% suffer from a dangerous condition called cataplexy, in which muscles become spontaneously paralyzed.
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