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Scientists at the Johns Hopkins Bloomberg School of Public Health found that four pollutants found in house dust add to the ability of a common household insecticide to inhibit an enzyme important in neurologic function in humans.

A primary care physician, who establishes long-term personal relationships with patients and coordinates their care, can protect poorer patients from some of the adverse health effects of poverty.

A survey of people having one or more relatives with colon cancer has found that those without significant family histories of the disease were just as eager to undergo gene testing for colon cancer as those with multiple affected relatives.

Two bacteria, Streptococcus pneumoniae and Haemophilus influenzae, are leading causes of meningitis and pneumonia worldwide, and yet in less developed countries health care workers think the diseases they prevent are infrequent or unimportant.