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

"It is a movement in the right direction," "It is good, but it is just not good enough yet.

VOA: standard.2009.11.12

While the money is good, it's not quite good enough to live on full time.

VOA: standard.2010.08.03

"But for those who were laid off last month and the millions of Americans who have lost their jobs in this recession, a good trend is not good enough.

VOA: standard.2009.12.06