Today's Top Medical Stories for Monday, July 21, 2014

By CBS News

Published 07/21 2014 11:41AM

Updated 07/21 2014 11:43AM

HIV rates are declining in the US.
New research from the Centers for Disease Control and Prevention shows the annual HIV diagnosis rate in the US has decreased more than 30 percent from 2002-2011.
While declines have been seen in several groups including women and people 35 to 44, cases among homosexual men remained stable overall and increases were seen in some groups of young men.

A new study found most of the genetic risk for autism comes from versions of genes that are common and not rare mutations. 
Researchers at Mount Sinai in New York say knowing the nature of the genetic risk can help them better understand the disorder that right now has no cure.

And attending a successful school may improve a  student's behavior as well as their performance in the classroom.
A new study in the journal Pediatrics looked at high school students from low-income neighborhoods.  Students who were admitted to high-performing public charter schools performed much better on math and English tests .
Fewer teens in charter schools also engaged in very risky behaviors.

(David Begnaud, For CBS News)

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