Swine Flu Pandemic…

June 11 (Bloomberg) — Swine flu, causing mostly mild disease outbreaks on four continents, prompted the World Health Organization to declare the first influenza pandemic since 1968.

Margaret Chan, the WHO’s director-general, moved the alert to the top of the agency’s six-stage pandemic scale today on evidence the virus is spreading in communities outside the Americas. The new H1N1 flu strain has taken root in Australia, Chile, the U.K. and Spain since its discovery in Mexico and the U.S. in April.

The pandemic declaration confirms the fourth time in the last century a new influenza strain has swept across the globe. It’s the third time since April 27 that Geneva-based WHO has raised the alert level over swine flu, which has turned up in more than 70 nations as far removed as Iceland, New Zealand and the Bahamas. The move doesn’t mean there will be more deaths or severe cases, Chan said.

“We are seeing a moderate pandemic,” Chan told reporters on a conference call before making the announcement. “We are satisfied that this virus is spreading to a number of countries and it is not stoppable.”

Drugmakers will be finishing their production of seasonal influenza vaccine for the Northern Hemisphere winter in coming weeks, Chan said.

“We would advise them, as soon as they finish their seasonal vaccine production, quickly prepare to make commercial- scale pandemic vaccine,” she said.

Response Plans

WHO urged countries not to implement pandemic response plans designed for a more severe threat after government leaders said last month that moving to phase 6 may spur some countries to restrict travel, ban public events and adopt other measures that aren’t needed for mild flu, worsening the deepest economic slump since the Great Depression.

“Some political leaders worry about some unwarranted overreaction and some are also concerned that, because of the mildness of the disease, people will say ‘so what’s the big deal about pandemic?’” she said. “The balance between overreaction or complacency is another issue that’s of great concern.”

U.S. health officials said they won’t be changing their response to the virus based on the new pandemic designation and have already been responding to the outbreak like they would for a pandemic. There have been more than 13,000 confirmed cases in the U.S., which have caused about 1,000 hospitalizations and 27 deaths, according to the U.S. Centers for Disease Control and Prevention in Atlanta.

‘Strong Message’

“For all intensive purposes, the U.S. government has been in phase 6 of the pandemic level for some time,” Thomas Frieden, director of the CDC, said in a conference call today with reporters. “This does send a strong message that the virus is here and likely to stay.”

In the U.S., the virus has been most severe in children, young adults and those with asthma or who are pregnant, Frieden said. The virus has spread the most widely in Massachusetts, New York and New Jersey. About 7 percent of New Yorkers likely had swine flu in May, according to a survey released yesterday by the New York City health department.

The United Nations health agency doesn’t advise border closures or restrictions on travel and trade, Chan said.

WHO is watching for any sign the disease is worsening as the germ circulates during the Southern Hemisphere’s flu season, creating opportunities for its genes to mutate or combine with those of other viruses, including the H5N1 bird flu strain that’s lethal in three of every five reported cases. The new virus has genes from other strains that have sickened humans, pigs and birds.

Biggest Concern

“The tendency to move into complacency is our biggest concern because we need to continue to monitor this virus, follow its track and not allow it to come back in the second wave to give us more trouble,” Chan said…read more here…