Groundhog Day report: Flu's worsening shadow blanketing US
UK allows doctors to make babies with DNA from 3 people
Nurses with a mission: Send older ER patients home with help
Cancer from cellphones? New studies say no need to hang up
Florida ER nurse in viral video: 'Wash your stinking hands'
Philippines: 3 deaths may be linked to dengue vaccinations
Tax overhaul charge hands Merck 4Q loss despite higher sales
Medicare tightens oversight of opioid prescriptions
Doctors warn of heart risk from some breast cancer therapies
Turn on the tap: EU acts to improve water, reduce plastic
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