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(yellow) on the surface of a dying cell

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DEXAMETHASONE has become the first drug shown to lower the death rate from covid-19. The discovery of the benefits of this widely available steroid, which damps down an overactive immune system, was seen as a much-needed piece of good news. But we will need lots of other treatments to help us turn the tide of severe covid-19.

Many of the coronavirus drug trials so far have looked at antiviral medicines that may stop the virus from replicating. While some of these appear to shorten …



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