While research has suggested that the prevalence of autism spectrum disorders in American children was about 1 of every 150 children, a new government study estimates that the prevalence is more likely about 1 in every 91 children.
The researchers culled data for the study from the 2007 National Survey of Children's Health, which included more than 78,000 children from across the country, all between 3 and 17 years old.
Health Glance
Any health-care overhaul that Congress and President Obama enact is likely to have as its centerpiece a fundamental reform: Insurers would not be allowed to reject individuals or charge them higher premiums based on their medical history.
America's healthcare industry has spent hundreds of millions of dollars to block the introduction of public medical insurance and stall other reforms promised by Barack Obama. The campaign against the president has been waged in part through substantial donations to key politicians.
According to a new U.S. Geological Survey study, scientists detected mercury contamination in every fish sampled in nearly 300 streams across the United States.
Waterways across the upper Midwest are increasingly plagued with ugly, smelly and potentially deadly blue-green algae, bloomed by drought and fertilizer runoffs from farm fields, that's killed dozens of dogs and sickened many people.
The Food and Drug Administration admitted Thursday that it mistakenly approved a patch for injured knees last year after being pressured by members of Congress and the manufacturer.
The world moved a step closer to developing an enduring defence against AIDS after researchers in Thailand unveiled the results of a vaccine trial on Thursday that cut the risk of becoming infected with the HIV virus by nearly one-third and will not lead to secondary complications.





























