The World Health Organization says it needs to see clear evidence of sustained community transmission of the swine flu virus from person-to-person in at least two regions of the world before it raises its alert to the phase six pandemic level.

VOA: standard.2009.05.14

For the first time the W.H.O.raised its alert level from phase four to phase five on April twenty-ninth.

VOA: special.2009.05.06

He strained his eyes to see he knew not what. His senses were all alert.

VOA: special.2009.10.31

Pyongyang also promised to alert the South if similar situations arise in the future.

VOA: standard.2009.09.09

The U.S.State Department has issued a fresh travel alert for India, saying the U.S.government continues to receive information that terrorist groups may be planning attacks here.

VOA: standard.2009.10.30

"With that,I expect the security agencies to be 24-hours alert.

VOA: standard.2009.07.30

General Fonseka,in the letter, says Sri Lanka asked India on October 15 to place troops on alert in case they would be needed to intervene to foil a coup on the island.

VOA: standard.2009.11.14

"I hope that what a study like this will do would be to help alert clinicians, residents in training, and medical students that severity is an important factor to consider in planning treatment,".

VOA: standard.2010.01.08

"It's physiological and it's emotional." "Physiologically,we have a tendency when we come into a situation that seems dangerous we get a lot of chemicals flowing through our bodies to help us stay alert, to be able to act if we need to act.

VOA: standard.2010.07.01

"This change to a higher phase of alert is a signal to governments, to ministries of health and other ministries, to the pharmaceutical industry and the business community that certain actions should now be undertaken with increased urgency, and at an accelerated pace,"

VOA: standard.2009.04.29