Like many highly addictive drugs, ketamine causes a rush of dopamine in the brain. But new research in mice from the University of Geneva shows ketamine also blocks the brain process that leads to neuroplasticity, habit formation and compulsion.

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Following recent reports of the first polio case in the US in almost a decade, the CDC reported the virus has been detected in wastewater samples as far back as June in Rockland County, a region north of New York City known for low vaccination rates.

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A new study has homed in on how animal proteins can raise heart disease risk, by illustrating the way metabolites produced by certain gut bacteria while digesting red meat play a significant role in cardiovascular disease.

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A 66-year-old man has become the fourth patient, and the oldest to date, to be effectively cured of a HIV infection after undergoing a stem cell transplant from a donor with a rare genetic mutation that has been linked to HIV resistance.

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For the last few years, Kevin Ngo has spent his spare time developing a new kind of reusable face mask. The resulting Flo Mask is a radically different take on face masks: light, comfortable, and as protective as any disposable mask around.

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Researchers have found strong evidence exposure to a common group of household chemicals can be associated with 13 different health conditions. The related economic costs have been estimated at between US$5 billion and $60 billion annually in the US.

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