Ebola treatment centers in the country are beyond capacity with victims.
Researchers find drug-resistant bacteria in waters where events will be held during the 2016 Olympics.
Drug-resistant infections will kill an extra 10 million people a year worldwide, study claims.
Prescribed narcotics use still seen at dangerous levels in the U.S.
Between 2001 and 2013, 4.3 million deaths were averted, the World Health Organization said.
The flu vaccine may not be an adequate match for the strains of the flu circulating this year.
Head of the U.N. Ebola response mission in West Africa says disease could spread to other parts of the world.
Highly contagious strain of bird flu was discovered at a poultry farm in the Netherlands.
Doctors Without Borders will begin testing three therapies in West Africa.
The virus that has broken out in multiple U.S. states has killed four people.
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