For at least two decades, the New York City Housing Authority routinely disputed tests that revealed lead in its apartments. Private landlords almost never do this

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The FDA on Wednesday cleared the first DNA test meant to be marketed directly to consumers to help them determine how well certain drugs may work for them. The test was developed by 23andMe and, as with other tests from the consumer genetics giant, customers will be able to simply mail in a spit sample to get results

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Janet Winston had a rash that wouldn’t go away. The English professor from Eureka, Calif., always had been sensitive to ingredients in skin creams and cosmetics. This time, however, the antifungal cream she was prescribed to treat her persistent rash seemed to make things worse. Was she allergic to that, too?

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A simulation lets autonomous cars experience situations that are too dangerous to try in reality

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A landmark report says pregnant and lactating women should be included in clinical trials. It’s unclear what the chances are that DHHS will agree with the recommendations in the report, but either way, says Ruth Faden, founder of the Johns Hopkins Berman Institute of Bioethics, “the very existence of the report is huge.”

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A new study shows that fentanyl test strips nudge drug users to take extra precautions

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In 2016, as the mosquito-borne Zika virus spread through the Americas and cases of infected women having brain-damaged babies mounted, investigators raced to develop a vaccine. Now, a $110 million vaccine trial is underway at 17 sites in nine countries, but it faces an unexpected, and ironic, challenge

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Julia Brody writes, “My lab has been doing that for years.”

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