The researchers say many, if not all,people likely have these antibodies but do not always produce or use them efficiently.

VOA: special.2009.03.04

If not,they say, the future of food security, economic development and social stability in dry areas will be put at risk.

VOA: special.2010.02.08

If not,she says, they may be at increased risk for age-related broken bones years after their visits to space.

VOA: special.2009.03.10

But the popular meaning of Valentine's Day continues to capture hearts around the world, even if not always on February fourteenth.

VOA: special.2010.02.08

The study found that losses from obesity are now equal to, if not greater than, those from smoking.

VOA: special.2010.01.13

But many more would have died if not for a tsunami warning from the Japanese Meteorological Agency.

VOA: special.2011.06.07

He says many,if not all, of the top American colleges once had a core curriculum a set of courses required for all students.

VOA: special.2009.10.22

Calhoun said that for a long time he had believed that the dispute over slavery -- if not settled -- would end in disunion.

VOA: special.2009.03.26

If not,the thinking goes, then self-interest will lead to overuse and destruction of shared resources.

VOA: special.2009.10.16

If not,they could face a fine of two thousand dollars a year for every worker.

VOA: special.2010.03.24

Some autoimmune forms of arthritis, if not treated, may cause joints to become deformed.

VOA: special.2010.05.19

If not treated, malaria can make the victim very sick and even cause death.

VOA: special.2010.04.20

Combinations of drugs are able to suppress the deadly virus in the body -- if not a cure, in the traditional sense but the next best thing.

VOA: special.2010.07.14

The treatments can cause dangerous and even deadly reactions if not used carefully.

VOA: special.2010.01.25