The Centers for Disease Control says HEPA filters are effective in clearing the air of many particles that cause disease.

VOA: special.2009.07.14

These urge local officials to balance to risk of flu in their communities with the problems that school dismissals could cause.

VOA: special.2009.08.13

An extremely low body temperature can cause the heart to beat so slowly that a pulse may be difficult to find.

VOA: special.2009.12.30

It belongs to the same family of bacteria as those that cause tuberculosis and Hansen's disease, also known as leprosy.

VOA: special.2009.04.06

Still,doctors say it is possible that such events might cause symptoms of Parkinson's to appear earlier than they would have.

VOA: special.2009.04.07

They helped cause angry whites to form the Ku Klux Klan and other groups that terrorized blacks for years to come.

VOA: special.2010.02.04

There is a risk that giving a patient a strong blood thinner during a stroke can cause bleeding inside the brain.

VOA: special.2009.09.22

At the time that Miss Jordan left Congress, there were widespread reports that failing health was the cause for her decision.

VOA: special.2010.05.09

The World Health Organization says mosquitoes carry organisms that cause disease and death for millions of people throughout the world.

VOA: special.2009.05.26

They also must provide detailed information about nearby water and environmental issues that could cause wildlife to gather near an airport.

VOA: special.2009.04.01

Jeff said it was a sad thing to think that they were the cause of the breaking of a woman's heart.

VOA: special.2010.04.24

Researchers for the RAND Corporation and the University of California at Los Angeles have said that few medical errors cause injury.

VOA: special.2010.07.13

But she says it must be shown scientifically that cord blood stem cells cause improvement, and not other reasons.

VOA: special.2011.02.01

The gene was found in eleven bacterial species, including those that cause cholera and dysentery, a diarrheal disease.

VOA: special.2011.04.27