He says the companies that make vaccines cannot really do much when they have a virus that does not grow well.

VOA: special.2009.11.24

The vaccine did not lower the amount of virus in the blood of volunteers who became infected during the study.

VOA: special.2009.10.13

A recent report in the journal Retrovirology found that xenotropic murine leukemia virus-related virus is not the cause of chronic fatigue syndrome.

VOA: special.2011.01.18

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

The World Health Organization will not declare an influenza pandemic unless a virus becomes widespread in at least two areas of the world.

VOA: special.2009.05.06

But so far the virus has not shown itself to be more severe than seasonal flu.

VOA: special.2009.08.05

She believes the chimp virus infection is not quite as damaging as H.I.V.is in humans.

VOA: special.2009.09.08

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

Pandemic experts explain a second wave does not necessarily entail any change in the composition of the virus.

VOA: standard.2009.09.04

Flu vaccines are not difficult to produce, but the drug companies found this virus difficult to grow.

VOA: standard.2010.04.29

The new virus led to patterns of death and illness not normally seen in influenza infections.

VOA: standard.2010.04.29

Health officials did not know how deadly the virus would be, who would be most vulnerable, how quickly it would spread and whether it could be contained.

VOA: standard.2010.04.29

The virus did not mutate to a more virulent form.

VOA: standard.2010.01.18

Head of the International Red Cross Federation's Influenza team, Robert Kaufman, says the impact of a novel virus on a community without immunity is not just about the number of illnesses and deaths.

VOA: standard.2009.09.04

The Mexican tourist, who is in stable condition, is the only case of swine flu in Hong Kong so far, but Dr.Chow says the city should not be complacent, because the virus continues to spread worldwide.

VOA: standard.2009.05.08

There is a lack of regular running water in several areas, while doctors at the local hospital admit they do not always provide blood to patients that is tested for the HIV virus that causes AIDS.

VOA: standard.2010.02.14

"It does not really matter because in the best case scenario we have today,we will still have a moderate virus that is projected to cause several million deaths extra deaths than the usual influenza annual mortality, which means that even in the best-case scenario, we do have an emergency on our hand,"

VOA: standard.2009.09.04

Chan says governments around the world are far more prepared to deal with a pandemic now than they were five years ago when the far more lethal She adds it is fortunate the current because the world is not prepared to deal with such a toxic and deadly virus.

VOA: standard.2009.12.29