U.S. scientists seeking to unravel the mysteries of HIV have made an important breakthrough after capturing the clearest image yet of a protein which allows the deadly virus to attack human immune cells, new research showed Tuesday.

Scientists at The Scripps Research Institute (TSRI) and Weill Cornell Medical College have managed to obtain a detailed view of the atomic structure of the protein which envelops HIV, the virus which causes AIDS.

U.S-funded scientists said Thursday they have devised an experimental vaccine against a common childhood illness called respiratory syncytial virus (RSV).

There is currently no vaccine on the market for RSV, which is the world's second-leading killer of babies aged one month to one year, after malaria.

Japanese researchers said Thursday they had moved a step closer to an oral treatment for diabetes, offering hope of a breakthrough against a disease racking an increasingly obese world.

Scientists at the University of Tokyo said they have created a compound that helps the body to control glucose in the bloodstream.

Five decades of isolation, military rule and woeful health care have left Myanmar with a particularly high rate of blindness. Now the veil of darkness is starting to lift, thanks in part to an "assembly line" surgical procedure that allows cataracts to be removed safely, without stitches, through two small incisions.

Nepalese surgeon Sandut Ruit, who helped pioneer the technique, oversaw nearly 1,300 operations at two massive eye camps in 10 days in October, with dozens of local ophthalmologists looking on and helping.

Slapping a 20 percent tax on soda in Britain could cut the number of obese adults by about 180,000, according to a new study.

Though the number works out to a modest drop of 1.3 percent in obesity, scientists say that reduction would still be worthwhile in the U.K., which has a population of about 63 million and is the fattest country in Western Europe. About one in four Britons is obese.

The U.S. Food and Drug Administration says that almost 7 percent of imported spices over a three-year period were contaminated with salmonella.

In a report released Wednesday, the FDA says testing of imported spices between 2007 and 2010 showed that spices were twice as likely as other inspected foods to be contaminated with the pathogen. More than 80 different types of salmonella were detected.

Smokers younger than 21 in the nation's biggest city will soon be barred from buying cigarettes after the New York City Council voted overwhelming Wednesday to raise the tobacco-purchasing age to higher than all but a few other places in the United States.

City lawmakers approved the bill — which raises from 18 to 21 the purchasing age for cigarettes, certain tobacco products and even electronic-vapor smokes — and another that sets a minimum $10.50-a-pack price for tobacco cigarettes and steps up law enforcement on illegal tobacco sales.

Closing live poultry markets, though a huge economic setback, is a sure-fire way of curbing the deadly H7N9 bird flu in case of an outbreak, disease control researchers said Thursday.

The closure of 780 live poultry markets (LPMs) in the Chinese cities of Shanghai, Hangzhou, Huzhou and Nanjing in April reduced the daily number of H7N9 infections by more than 97 percent, said a study in The Lancet medical journal.

President Barack Obama's health secretary publicly apologized Wednesday for the rocky rollout of the U.S. health care law's new website, stressing that citizens "deserve better" from the system.

But while Secretary of Health and Human Services Kathleen Sebelius regretted that navigating HealthCare.gov has been a "miserably frustrating experience" for many, she insisted that so-called "Obamacare" has been working well for millions of Americans.

A patient suspected of having contracted the MERS coronavirus has tested negative for the lethal respiratory disease, France's health ministry has announced.

The ministry had initially said Tuesday that a person who had just returned from Saudi Arabia, where the Middle East Respiratory Syndrome Coronavirus (MERS-CoV) first appeared in September 2012, was likely infected by the virus.