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SAN FRANCISCO, June 13 (Xinhua) -- Social networking giant Facebook will likely go public in the first quarter of 2012 with a valuation that could top 100 billion U.S. dollars, U.S. media reported on Monday.In a report, CNBC quoted people familiar with the matter as saying that Facebook could submit filing to register its securities with the U.S. Securities and Exchange Commission (SEC) as early as October or November this year.People who are on Wall Street and track this information told the business news television channel that they think the Facebook initial public offering (IPO), if and when it happens could value the company of more than 100 billion dollars.A factor in the company's IPO timing is the SEC's requirement that companies must disclose financial information if they have more than 500 private investors."The company has until the end of April 2012 to disclose their financials, but they may just want to get ahead of that by doing a formal initial public offering, I'm told. And that could happen in the first quarter of the year," said CNBC Wall Street reporter Kate Kelly.Facebook is also facing internal pressure as employees have not been permitted to sell their private shares on the secondary market since last spring. An IPO would make it easier for employees to monetize their shares, said Kelly, citing sources.Facebook shares have been traded in private markets such as Sharepost.com, which puts the social networking company's valuation at 85 billion dollars.Meanwhile, latest data show that Facebook is losing users last month in the United States, Canada and several European countries, indicating that the company could have hit the limits of expansion in its mature markets.

BEIJING, Aug. 16 (Xinhuanet) -- It is widely accepted that obesity leads to an increased risk of health complications, but new studies quoted by media Tuesday challenge the conventional notion.“Our studies challenge the idea that all obese individuals need to lose weight,” said Dr. Jennifer Kuk, assistant professor in York University’s School of Kinesiology & Health Science in Toronto.  One of the studies used data from the Aerobics Center Longitudinal Study consisting of 29,533 individuals and assessed their mortality in 16 years.It found no difference in death risks between normal-weight individuals and obese ones. "Since the obese people did not have greater risk of dying than normal weight individuals, they don’t need to lose weight," said Dr. Kuk.But the finding did not give obese individuals a “free license” to gain weight, Dr. Kuk added. Maintaining weight, eating right and exercising may be better than trying to lose weight in the long run, said Dr. Kuk.

LOS ANGELES, June 7 (Xinhua) -- Salmonella, not E. coli, poses the greatest health threat to Americans, the U.S. Centers for Disease Control and Prevention (CDC) announced on Tuesday.Salmonella infections have risen 10 percent over the past 15 years, while several types of foodborne illness have been falling, the agency said in a report.Infections from Shiga toxin-producing E. coli O157 (the strain of most concern in the United States) have dropped almost in half and the rates of six other foodborne infections have been cut 23 percent, the CDC said.The agency issued the report as a deadly new strain of E.coli is spreading in several European countries."There are about 50 million people each year who become sick from food in the U.S.. That's about one in six Americans," CDC director Dr. Thomas R. Frieden said.The CDC attributed the reduction in infections from E. coli O157 to better detection and investigation of outbreaks, cleaner slaughterhouse methods, better testing of ground beef for E. coli, improved inspections of ground beef processing plants, regulations prohibiting E. coli O157 in ground beef and increased awareness of the importance of properly cooking beef.Other foodborne illnesses that fell in incidence over the same time period include those caused by the campylobacter, listeria, vibrio and yersinia pathogens.To reduce their risk of foodborne illness, people should assume that raw chicken and other meat have bacteria that can make you sick, the CDC said.In the kitchen, raw meats should not allow to contaminate counter tops or cutting boards and should be kept away from other foods, such as fruits and vegetables, the CDC advised.The agency also called on people to thoroughly cook meat, poultry, eggs and shellfish, while refraining from consuming unpasteurized milk, juice or soft cheese.

GENEVA, Aug. 19 (Xinhua) -- The World Health Organization (WHO) and the UN Children's Fund (UNICEF) started an emergency vaccination campaign in all accessible areas of South and Central Somalia, WTO spokesperson Tarek Jasarevic said here on Friday.In July 2011 alone, 1,019 suspected measles cases and 31 related deaths were reported in South and Central Somalia, representing 20 percent of all reported cases for this year.The major factors for a measles outbreak in Somalia are low coverage, malnutrition, population movements, and overcrowed internally displaced (IDP) camps."WHO fears that the measles outbreak could affect a high number of people, especially among the vulnerable IDPs whose overall health is already fragile," Jasarevic said.About 2.5 million children aged between 6 and 15 in 10 regions of South and Central Somalia, including children in Mogadishu, will be targeted during this campaign.

BERLIN, June 17 (Xinhua) -- German authority said on Friday first case of human spreading deadly E. coli is detected, as death toll increases to 39 worldwide.A woman working in a kitchen of a catering company was infected by E. coli from sprouts, though she didn't fall ill immediately, said Harald Kehlborn, a spokesman for the consumer protection ministry of German state Hesse.Then she spread E. coli unconsciously to another 20 people through the food she prepared, said Kehlborn.The woman later developed serious complication of hemolytic- uremic syndrome (HUS), which causes failure of kidney and nervous system.According to the data of the Robert Koch Institute, Germany's national disease control centre, the number of people who are infected has reached 3,408 in Germany and 798 people have fallen into HUS, while the infection speed is slowing down.