Polio is no longer a concern in Western countries because of mass inoculations starting in the 1950s.

VOA: standard.2010.08.02

The flow of illegal drugs and the violence associated with it is a concern throughout North America.

VOA: standard.2009.08.10

They are known as Asian Carp and the explosion of their population in the Illinois River is a concern to large-river ecologist Kevin Irons.

VOA: standard.2010.07.20

But it says that has allowed some long-standing disputes among national and regional leaders to re-emerge and become a concern for the long term.

VOA: standard.2009.03.31

"Right now I think there is still a concern that European countries are acting unilaterally.

VOA: standard.2010.05.25

Senator Romero says her measure highlights a concern for victims of asbestos.

VOA: standard.2010.07.26

Right now,as schools prepare to begin a new year, one concern is the H1N1 virus, often called swine flu.

VOA: special.2009.08.13

Another concern is that trade partners may consider the G.M.rescue a form of government support barred by free trade agreements.

VOA: special.2009.06.05

But the disease also appeared in a cooler climate in two thousand seven, causing concern about its spread.

VOA: special.2009.04.13

The WHO's Director-General,Margaret Chan, has expressed concern there is not a good process in place to produce enough vaccine against the virus.

VOA: special.2009.08.18

Agency chief Margaret Chan has expressed concern there is not a good process in place to produce enough vaccine against the virus.

VOA: special.2009.08.05

And the announcement a month later of a non-aggression treaty between Germany and the Soviet Union gave Tokyo even more cause for concern.

VOA: special.2011.05.26

Mr.Bluemling's family expressed concern for his safety in a country where Islamic militants have sometimes attacked Westerners.

VOA: special.2011.03.03

The tipping point for so many people is the more constant concern of putting food on the table and providing for a family.

VOA: special.2011.05.21