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The RECOVERY trial tests a range of potential treatments for COVID-19, including low-dose dexamethasone (a steroid treatment). Patients were randomised to receive dexamethasone 6 mg once per day for ten days and were compared with patients receiving usual care alone. Dexamethasone reduced deaths by one-third in ventilated patients and by one-fifth in other patients receiving oxygen only; there was no benefit among those patients who did not require respiratory support. Based on these results, 1 death would be prevented by treatment of around 8 ventilated patients or around 25 patients requiring oxygen alone.

Pills in a petri dish, in front of a microscope

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