The discovery in Britain that a £5 steroid, dexamethasone, can be effective in treating Covid marks a potential breakthrough in our understanding of the virus. Much remains to be learned about the wider potential of the drug but the claims made about its success are striking: that it reduces deaths by a third in patients on ventilators and by a fifth in patients receiving oxygen only. It has not been shown to benefit Covid patients who do not require oxygen. But this can still, in a global pandemic, mean thousands of lives saved.
There are two further points to be made. With Covid-19, there is a better chance of finding a treatment for the virus than of finding a vaccine. Second, the gathering and interrogation of this data can be of huge use in finding out what works and what does not.
The UK study looked at the role of old familiar generic drugs.
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