The World Health Organization's flu chief said the swine flu virus has now become the predominant flu strain worldwide.

The World Health Organization's flu chief said the swine flu virus has now become the predominant flu strain worldwide.

The World Health Organisation on Thursday urged people not to drop their guard over the swine flu pandemic and insisted on the value of vaccination despite the broadly mild symptoms of the virus.

The World Health Organisation on Thursday urged people not to drop their guard over the swine flu pandemic and insisted on the value of vaccination despite the broadly mild symptoms of the virus.

WHO flu chief: Swine flu virus now the predominant flu strain worldwide; vaccine 'highly safe'. The World Health Organization's flu chief said the swine flu virus has now become the predominant flu strain worldwide.

GENEVA (Reuters) - H1N1 swine flu is on the rise in China and Japan after triggering an unusually early start to the winter influenza season in Europe, Central Asia and North America, the World Health Organization said on Friday.

GENEVA (Reuters) - Cases of the H1N1 pandemic influenza virus showing resistance to antiviral drugs are "isolated and infrequent," the World Health Organization said on Thursday.

World Health Organization chief Margaret Chan on Friday urged governments to prepare for a likely second wave of swine flu cases, cautioning they will face tough decisions on how to dispense vaccines.

World Health Organization chief Margaret Chan on Friday urged governments to prepare for a likely second wave of swine flu cases, cautioning they will face tough decisions on how to dispense vaccines.

As schools around the world reopen, health authorities are bracing for a major spike in swine flu.

As swine flu returns, US and European officials consider whether _ and when _ to shut schools. As schools around the world reopen, health authorities are bracing for a major spike in swine flu.

As swine flu returns, US and European officials consider whether _ and when _ to shut schools. As schools around the world reopen, health authorities are bracing for a major spike in swine flu.

WHO flu chief urges more drug makers to donate flu vaccines to poorer countries. The World Health Organization's flu chief urged drug makers on Saturday to donate swine flu vaccines to the world's poorest countries, which are more vulnerable in the fight against the pandemic.

The World Health Organization's flu chief urged drug makers on Saturday to donate swine flu vaccines to the world's poorest countries, which are more vulnerable in the fight against the pandemic.

GENEVA (Reuters) - The World Health Organization stuck on Tuesday to its statement that about two billion people could catch H1N1 influenza by the time the flu pandemic ends.

Health ministers from the Group of Seven most industrialised nations and Mexico met Friday to set out a battle plan against the swine flu pandemic, which threatens to worsen.

WASHINGTON (Reuters) - One million heart attacks, 700,000 strokes and 900,000 miscarriages -- U.S. public health officials want Americans to know these will happen every single year with or without a swine flu vaccine campaign.

The World Health Organization's flu chief says there must be no doubt over the safety of swine flu vaccines before they are given to the public.

AP Interview: WHO flu chief: World still 'relatively early' in swine flu pandemic. The World Health Organization's flu chief says the global swine flu pandemic is still in its early stages and reports of over 100,000 infections in England alone last week are plausible.

CHICAGO (Reuters) - Pregnant women infected with the new H1N1 swine flu have a much higher risk of severe illness and death and should receive prompt treatment with antiviral drugs, U.S. government researchers said on Wednesday.