Former U.S. Sen. George Mitchell, who launched an independent probe into the use of performance-enhancing drugs in March 2006, was expected to name on Thursday at least 50 Major League Baseball players who used banned drugs, despite rules and health warnings.

NUSA DUA, Indonesia (Reuters) - Millions more people will be at risk from illnesses such as malaria and diarrhea in a warming world beset by heatwaves and water shortages, the World Health Organization said on Thursday.

Climate experts say rising temperatures and heatwaves will increase the number of heat-related deaths, while higher ozone levels from pollution will mean more people suffering from cardio-respiratory disease.

LONDON (Reuters) - Scientists have made two significant advances in developing a stem-cell patch to repair the damage caused to the heart after an attack.

CHANNAI, India (Reuters Health) - In a study conducted in India, vitamin A supplements given in the early newborn period reduced the risk of infant deaths from diarrhea, fever and respiratory infections, but did not reduce the occurrence of these problems.

TORONTO (Reuters) - Canada suspended use of three batches of a mumps vaccine on Wednesday after five people fell ill in the midst of a vaccination campaign in the western province of Alberta.

CHICAGO (Reuters) - Childhood allergies to milk and eggs appear to be harder to outgrow than in the past, U.S. researchers said on Wednesday.

Pushed by the Democratic-led Congress but also supported by many Republicans, the bill was aimed at providing health insurance to about 10 million children in low- and moderate-income families. Taxes on cigarettes and other tobacco products would have been increased to pay for the aid.

Merced, California -  A partnership between agricultural leaders and UC Merced aims to help California farmers maintain the environment and the economy.

California is the nation's leading dairy state, generating $5.2 billion in milk and cream sales a year. While that keeps the state's 1.7 million dairy cows busy making milk, they also produce plenty of manure. The manure is filled with nutrients that farmers can use as fertilizer, but it also can pollute the environment.

BOSTON (Reuters) - It took 18 months for her smile to come back completely, but doctors say the French woman who received the world's first partial face transplant is doing well and is very satisfied with the results.