At least 20 people have died of swine flu in China this year, the health ministry said Friday, but officials said there was no reason to panic even as the flu season reaches its peak.

The fatalities from A(H1N1) influenza have been recorded in at least nine locations since mid-January, the ministry said.

Studies on animals suggest that a new hybrid drug, made in part from the chemical in the yellow spice turmeric, could help regenerate brain cells after a stroke, US researchers said Wednesday.

The molecular compound is made with curcumin, a natural yellow pigment that originates from a perennial herb called Curcuma longa and is popular in South Asian and Middle Eastern foods, particularly curries.

Babies lucky enough not to get HIV from their infected mothers still face up to a four times greater risk of dying in the first year because of a greater susceptibility to infectious disease, said a study Tuesday.

Researchers examined around 100 mothers and their babies in South Africa, and compared antibody levels among children who were born infected with HIV to children who escaped HIV, a group described as HIV-exposed infants.

For the first time in the history of heart disease research, a certain type of treatment has proven more effective in women than in men, according to a U.S. study published Monday.

The research found that women saw a 70 percent reduction in heart failure compared to men who saw a 35 percent drop when using cardiac resynchronization therapy with defibrillator (CRT-D), indicating it works twice as well in women.

Scientists in Britain have successfully tested a vaccine which could work against all known flu strains, the Guardian newspaper reported Monday.

The new vaccine, developed by scientists at Oxford University, differs from traditional treatments by targeting proteins inside the flu virus rather than proteins on the flu's external coat.

Female genital mutilation has established itself in Western countries in recent years because of growing migration flows, the head of an international migration agency said on Friday.

"With the growth in migration in recent years, the phenomenon has unfortunately reached Europe (and) the United States," said William Lacy Swing, head of the International Organization for Migration (IOM).

A "tsunami of obesity" is unfurling across the world, resulting in a near-doubling of the numbers of dangerously overweight adults since 1980, doctors warned on Friday.

More than half a billion men and women -- nearly one in nine of all adults -- are clinically obese, according to research by a team from Imperial College London, Harvard and the World Health Organization (WHO).

Researchers have found a new mosquito in the west African nation of Burkina Faso that appears to be highly susceptible to malaria parasites and could help the disease spread, said a study Thursday.

The new subtype of Anopheles gambiae mosquitoes is believed to live mainly in the wild, whereas other species collected by scientists have been plucked from indoors where they are easier to find.

Nearly 3 million lives have been saved by HIV/AIDS treatment but scare resources are being misspent and stigma is still keeping the most vulnerable from seeking help, according to a new book by researchers commissioned by the U.N.

The failings are particularly worrying at a time when worldwide recession and donor fatigue are hurting spending on AIDS, the researchers say.

The cancer drug Avastin, also known as bevacizumab, is linked to a higher risk of death when combined with chemotherapy, said a study Tuesday in the Journal of the American Medical Association.

The drug has previously been found to raise the risk of blood clots in the legs and lungs by 33 percent, and in December the U.S. Food and Drug Administration said it was neither safe nor effective against breast cancer.