Image copyright PA Media Nobel laureates are among scientists calling for volunteers to be exposed to coronavirus after receiving a vaccine to see if it offers protection. In an open letter to the head of the US National Institutes of Health, the group says so-called "challenge trials" could accelerate vaccine development.The Oxford University Covid-19 vaccine…
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Your bones could be silently thinning for years before you ever fall and break one in midlife or older age—a fate that strikes up to half of women over 50, double the number of men. At the moment of a fracture, you might not even know you’d developed low bone density, as testing doesn’t usually
States are paying contractors such as Deloitte, Accenture, and Optum millions of dollars to help them comply with the One Big Beautiful Bill Act — a law that will strip safety-net health and food benefits from millions. State governments rely on such companies to design and operate computer systems that assess whether low-income people qualify