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Some immigrants have disturbingly high rates of Tuberculosis according to a new study that calls for more aggressive action. TB rates were highest among residents from lower Africa and parts of Southeast Asia.

Biogen Idec reported a higher-than-expected second-quarter profit on Tuesday as sales of its closely watched multiple sclerosis drug Tysabri surged past Wall Street estimates.

The Bush administration has said it "strongly" opposes the effort to give the Food and Drug Administration regulatory authority over tobacco.

Alex Ashkar is a model employee at the Bull Run coffee roastery. And he has autism. For Ashkar, finding meaningful work has been a lesson in understanding his limits. His first job at a local retailer didn't work out.

The unitedhealth group beat Wall Street expectations on Tuesday, and its shares rose despite a sharp drop in second-quarter profit.

Coronary heart disease is associated with a worse performance in mental processes such as reasoning, vocabulary and verbal fluency, according to a study of 5837 middle-aged Whitehall civil servants. The study also found that the longer ago the heart disease had been diagnosed, the worse was the person's cognitive performance and this effect was particularly marked in men.

Avian brood parasites lay their eggs in the nests of individuals of other species ("hosts") which take care of parasitic chicks. The screaming cowbird is a highly specialized brood parasite that uses almost a single host despite having many other potential hosts available.

Animals often live in groups. We know that individuals do not interact with others at random, but why this is the case remains unclear. One possibility is that their choice is affected by their 'personality', such as how bold or shy they are. We tested this using stickleback fish, and found that shy fish associated frequently with a small subset of other group members.

A newly discovered ancient lake in the Dry Valleys of Antarctica yields exquisitely preserved fossilized ostracods (tiny crustaceans) with soft anatomy, the first record of 3-dimensionally fossilized animal soft tissues from this continent. Modern aquatic environments of the Antarctic interior do not support ostracods.

BRITONS are still eating far too much salt - almost 50 per cent more than recommended levels, research revealed yesterday.