Nearly 14 months after declaring a new H1N1 flu to be a pandemic, the World Health Organization said that it's over.
The Pentagon, caught off guard by the spread of H1N1 and delays in vaccine production, is backing an unusual plan to use tobacco plants to make the vaccine.
After peaking last fall, cases of H1N1 have dwindled and seasonal flu has been a no-show. Doctors are trying to figure out why.
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SciClone Pharmaceuticals said preliminary results show its hepatitis B treatment enhanced the immune response of the Novartis H1N1 flu vaccine, opening up a possible treatment for people with weakened immune systems.
Just months after rushing to order enough swine-flu vaccine to protect their citizens, European governments are cancelling orders and trying to sell or give away extra doses as they sit on a glut of the vaccine.
At farms across Pennsylvania, thousands of roosters and hens have been toiling away in confidential conditions. Their mission: fertilize enough eggs to keep supplies of flu vaccine flowing.
Health officials must monitor swine flu for another year or more with a third wave possible, the WHO chief said.
North Korea sent out a nationwide alert in recent days about the apparent worsening spread of H1N1 flu there, according to an aid group with contacts in the country.
A senior House Democrat introduced legislation directing employers to pay for up to five days' sick leave for workers they send home because they have contracted the H1N1 virus.
Ukraine introduced some of the strictest measures in the world to combat swine flu after a spate of deaths in the west of the country.
Corporations worldwide are girding for swine-flu outbreaks, and devising plans to keep their offices and factories running.
Drug makers have shipped less than half the swine-flu vaccine expected this month due to production delays.
Three swine-flu studies detailing how some patients became gravely ill reinforced concerns that an outbreak could severely stress ICUs.
The U.K. drug maker said governments around the world have so far ordered 440 million doses of its swine-flu vaccine as they brace for a possible resurgence of the illness.
State and local budget cuts coupled with limits on who can administer the new swine-flu vaccine could hamstring efforts to delivery doses to anyone who wants it.
A Russian virologist's charge that authorities are understating the number of swine-flu cases has raised questions about Russia's claims to be relatively unaffected by the pandemic.
Fears among Muslims that this year's pilgrimage high season in Saudi Arabia will become a breeding ground for the new H1N1 flu has Saudi tourism officials worried.
The FDA approved vaccines designed to protect against the H1N1 influenza virus, a key step before starting a vaccination campaign.
The Obama administration, worried that people could fall ill with swine flu before a vaccine is available, is urging Americans to adopt preventive actions.
The H1N1 swine-flu virus is sickening people around the world, but so far isn't becoming more virulent, giving time to those rushing to deliver a vaccine.
While the U.S. is starting to see an uptick in the number of H1N1 cases, a new CDC report suggests the virus isn't becoming stronger. (CDC data)
Obama's scientific advisers presented a "plausible scenario" in which a large portion of Americans contract H1N1 swine flu.
Colleges and universities should keep students with swine flu out of class and away from others, officials said.
Hogs aren't spreading swine flu but they can catch it from people, requiring farmers to take extra care to prevent humans from sneezing on their livestock.
New calculations from the U.K. suggest that, in the worst-case scenario, 63,000 people in the country could die after contracting the H1N1 flu virus in the first wave of the pandemic.
The Argentine capital city, hit hard by the H1N1 flu strain, declared a health emergency and said it will add two weeks to school holidays in July.
The WHO declared the first flu pandemic in 41 years, even as it stressed there are no signs the H1N1 virus has turned more lethal.
The WHO will hold an emergency meeting as the H1N1 flu virus continues to spread, increasing the likelihood a pandemic will be declared. | Video
Over the next several months, the new H1N1 flu virus, strains of which have circulated for decades, could come back in a more virulent form.
Japanese makers of surgical masks say that despite boosting production amid the spread of A/H1N1 influenza, they can't keep up with demand.
Older adults may have some immunity to the H1N1 virus, possibly explaining why the flu has spread mostly among the young.
The H1N1 flu virus is likely to keep spreading rapidly among people, within countries and across the globe, the head of the WHO said.
A New York City assistant school principal has fallen critically ill with the H1N1 flu. New York said it would be closing three public schools in the borough of Queens.
Smithfield Foods, one of the world's largest pork processors, said that no AH1/N1 influenza was detected on their hog farms in Mexico.
Health authorities in China and Hong Kong confirmed new cases of the A/H1N1 virus in two people arriving on flights from North America.
The CDC urged pregnant women with flu-like symptoms to be treated with antiviral drugs to guard against serious complications of H1N1 influenza.
The emergence of A/H1N1 flu highlights a wider concern among scientists: Animal populations are growing too rapidly, raising the odds of disease outbreaks and other problems. | Photos
European health authorities said the number of A/H1N1 swine flu cases transmitted locally in Europe nearly doubled over the weekend.
China confirmed its first case of A/H1N1 swine flu and said it was attempting to quarantine all the passengers who had flown with the sick man aboard a flight from Tokyo.
The H1N1 virus claimed a third U.S. victim. Costa Rica reported the first death outside North America; officials elsewhere confirmed new cases.
Confirmed deaths in Mexico from A/H1N1 influenza rose to 45, with the most recent death occurring May 4, and confirmed cases of the infection rose to 1,364, the country's health minister said.
Hong Kong officials released 286 guests and employees from a quarantined hotel, ending a seven-day lockdown aimed at stopping the A/H1N1 flu. Photos
The confirmed number of H1N1 flu cases in the U.S. rose to 896 in 41 states.
Health officials from across Asia met in Bangkok on Thursday to discuss ways to coordinate their defense against the A/H1N1 flu virus.
U.S. officials said they remain concerned about the new H1N1 influenza strain despite lifting a recommendation that schools and daycares close if they have students or staff with H1N1 flu.
China allowed quarantined Mexicans to head home, while friction arose with Canada over banned pig imports and a group of quarantined students.
A woman living near the Mexican border became the second person in the U.S. to die flu. The CDC reversed a recommendation that schools close if they have sick children.
Health officials began ratcheting back some measures taken to halt the spread of a new influenza virus, after signs that the virus may pose fewer dangers than originally feared.
The Mexican government is reassuring visitors that it is ready to be reopened for business as evidence that the spread of swine flu may be starting to ebb.
Asia stands to be among the most vulnerable regions hit by a possible flu-related economic slowdown.
Many employers are scrambling to safeguard employees and prevent production interruptions should the swine flu outbreak become more widespread.
The swine-flu epidemic is also hammering Mexico's economy deeper into recession, economists said.
As fears of swine flu spread, companies ranging from soap manufacturers to makers of designer face masks are ramping up their marketing efforts.
U.S. pork producers face big losses as hog prices decline amid the swine-flu outbreak, and some could be forced out of the business.
A second wave of the flu known as H1N1 is widespread in more than a half of the states in the U.S. Track flu activity state-by-state.
The new AH1N1 virus that emerged in April accounts for nearly all U.S. flu cases so far this season. Track cases of different strains by region.
Take a look at how different parts of the world are preventing swine flu from spreading. (More swine flu coverage)
Significant incidences of the influenza virus and SARS.
The rapid spread of an influenza virus with characteristics of A/H1N1 flu is highlighting risks of disease among the world's rapidly growing animal populations.
See how doctors, nurses and patients are coping at Dr. Aurelio Valdivieso Hospital in Oaxaca, Mexico.
GlaxoSmithKline said one dose of its swine-flu vaccine gave participants in a clinical trial a high level of protection against the virus.
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Novartis said its swine-flu vaccine showed favorable results in an initial clinical study, giving more clarity to efforts by health authorities to plan autumn vaccination against the H1N1 virus.
A report in the British Medical Journal recommends against giving children under the age of 12 the antiviral agents Tamiflu or Relenza.
Pregnant women, children, young adults and health-care workers are among those groups who should be first in line to receive a vaccine against the H1N1 swine flu vaccine, a U.S. advisory panel recommended
Global health officials are scrambling to try to prevent the spread of the H1N1 virus, with U.S. officials moving with a recommendation that the FDA approve or license a vaccine.
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The U.K. government announced new measures against the swine flu as fears grow about the economic impact of the virus on a country already mired in recession.
Officials in Britain are scrambling to roll out a large-scale vaccination program in an effort to protect its population against the HINI flu outbreak.
The U.S. government signed contracts with four companies worth a total of almost $1 billion to purchase ingredients used to make vaccines against the new H1N1 influenza virus.
Concerned that the H1N1 pandemic will intensify in the fall, the Obama administration said it is proceeding with plans for a government-funded vaccination campaign.
The Swiss pharmaceuticals company released positive data on a vaccine for swine flu, a day after the WHO declared the first influenza pandemic in more than 40 years.
Sebelius said the U.S. will spend $1 billion to start the process of making an H1N1 influenza vaccine, though no decision has been made on whether to start wide-scale production.
A scramble among wealthy countries to guard against a flu pandemic has raised concerns about how poorer nations will cope. | WSJ.com/Flu
The flu outbreak has focused a spotlight on a looming risk for hospitals and their patients: a shortage of technicians to run critical lab tests.
The CDC's daily figure of 100 flu-related deaths is flawed, since the tallies are based on incomplete death certificates, but that hasn't stopped the spread of the erroneous statistic.
Even if the swine flu outbreak doesn't get more serious, the past few weeks have been a worthwhile exercise to test preparedness in the U.S., writes the Journal's John Bussey.
A debate over public safety and individual liberty has been taking shape recently alongside the hundreds of flu cases that have emerged across the U.S.
As new cases of the A/H1N1 flu virus are still being reported, Mexico City will live under the virus's shadow for weeks to come, even as life picks up again.
Different approaches to handling the spread of the new A/H1N1 flu strain has sparked confusion and consternation among local government officials, especially in Brownsville, Tex.
A few cases of confirmed swine flu have sent a shudder of anxiety through a string of Texas communities. But many residents are asking whether efforts to quell the outbreak are overblown.
Here are a few basics about the swine flu outbreak in the U.S. and Mexico.
Cybercriminals are capitalizing on swine-flu fears by pitching sales of fake Tamiflu, an Internet-security firm said.
Temporarily closing schools can help reduce flu transmission among children. But usually officials wait to long for closures to have much effect on the total burden of disease.
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While Agriculture Secretary Tom Vilsack says there is "no evidence" of the new swine flu in U.S. pigs, the federal government doesn't aggressively search for it on farms.
When Journal correspondent Joe Lauria fell sick last week, he set out to learn whether or not it was the dreaded swine flu -- to little avail.
Growing evidence in California suggests that early flu cases had no apparent origin in Mexico.
A picture is now emerging of how U.S. and Mexican officials first realized they faced a new type of flu virus and began racing to isolate its earliest origins.
With the world on the brink of a pandemic, scientists are trying to find the answers to some vital questions -- and quickly.
Edgar Hernandez's mysterious case of swine flu is at the center of a search in Mexico to find out how the epidemic began.
Health officials are trying to figure out why so many people are dying of swine flu in Mexico in contrast to elsewhere.
As the number of confirmed U.S. swine flu cases continues to rise, a host of questions have arisen about the lessons to be gleaned from two historical outbreaks, as well as how experts and the public should react.
Avian flu and SARS rudely awoke the world to the possibility of a new pandemic. Could a seemingly more mundane bug now put the world to the test?
The best health professionals can do is convert unknown risks to known risks.
Despite all the globalization said to be leading us toward nature's great comeuppance, trend lines indicate we are better equipped than ever to minimize the effects of a pandemic.
History shows the swine flu could take an economic toll.
By Tim Wilson
Patent protection is crucial to create new vaccines.
By Colum Murphy
We can all learn from SARS and avian flu.
The trouble starts in poor countries where too many people live in close proximity to pigs and poultry.