by Kelly MACNAMARA PARIS, France (AFP) — Oxford University and AstraZeneca on Tuesday became the first Covid-19 vaccine makers to publish final-stage clinical trial data in a scientific journal, clearing a key hurdle in the global race to produce safe and effective drugs for the coronavirus. The study, published in the respected Lancet medical journal, confirmed that the vaccine works in an average of 70 percent of cases. It comes during a flurry of positive […]