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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If you stride through the gym straight to the dumbbell rack, grab the first set of weights you see and immediately get to curling, your biceps-building workout is probably too rushed. To really emphasize the exercise's full range of motion and muscle contraction, through which you'll reap the most muscle-building benefit, you need to focus
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