Clots can block the flow of blood to the heart or brain and cause a heart attack or stroke.

VOA: special.2009.10.20

The director of its Vaccine Research Center,Gary Nabel, says each antibody blocks the virus from attaching to white blood cells.

VOA: special.2010.07.14

Last Friday he suffered a torn aorta, a large artery that carries blood from the heart to the body.

VOA: special.2010.12.18

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

Over the years,researchers have identified several substances in the blood that can serve as what they call cardiac biomarkers.

VOA: special.2009.07.15

For example, a murderer might have blood or dirt on his or her hands which leaves prints on the wall.

VOA: special.2010.05.05

There, researchers are developing a test that uses human saliva instead of blood to find those infected with malaria.

VOA: special.2010.04.20

He and his doctors believed he had gotten it when he received infected blood after his second heart operation.

VOA: special.2010.02.07

Hot weather also increases dangers for people who must take medicine for high blood pressure,poor blood flow, nervousness or depression.

VOA: special.2010.07.27

The other big problem with using human blood for making these blood agar plates is that they're actually not accurate."

VOA: special.2009.08.03

For example, your body reacts to stressful situations by raising your blood pressure and making your heart work harder.

VOA: special.2009.03.24

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

VOA: special.2011.02.01

For this workshop, Larissa used red paint to show how different murder weapons can leave different patterns of blood.

VOA: special.2010.05.05

Doctor Thompson said sixteen of the mummies had enough heart or blood vessel tissues remaining for the doctors to examine.

VOA: special.2009.12.15