The WHO's Phase 5 threat warning signals that a global pandemic could be imminent, but has yet to develop, with human-to-human transmission occurring in many geographical locations.

VOA: standard.2009.04.30

That basically means investors are worried that we are probably going to be going into a double dip scenario because of the sovereign debt crisis that is occurring in Europe."

VOA: standard.2010.05.25

"I think the most frequent type of attack that has been occurring in the past is people showing up with Molotov cocktails and throwing them into or at the homes of Roma in several towns of the country.

VOA: standard.2009.08.22

And,these are occurring at a time when the global economic crisis is making it more difficult to maintain good health, especially in the developing world.

VOA: standard.2009.05.18

He says in the current outbreak, most deaths are occurring among young, healthy people.

VOA: standard.2009.05.14

The debate about strategy and troop strength is occurring as 30,000 Pakistani troops are launching a massive military operation in South Waziristan, along the border with Afghanistan.

VOA: standard.2009.10.21

"I think in the long run what this does is to contribute to what seems to be occurring right now and that is the retrenchment of the Republican Party, opting for purity of ideological beliefs rather than a broad-based appeal to the general public."

VOA: standard.2010.05.04