Scientists have developed a blood test that can spot people at high risk of getting critically ill or dying of Covid. Imperial College London researchers have identified a cytokine - dubbed GM-CSK - that was at high levels early on in Covid patients that later suffered severe disease. In their blood screens the Imperial College London researchers found that GM-CSF was at high levels early on in patients that later suffered severe disease. But the researchers said the blood test wouldn't be suitable for mass blood testing of everyone who was positive for coronavirus because it was too complex. 'It would not be very useful to test patients at hospital when they're already unwell,' he said during a press briefing.

Source: Daily Mail March 10, 2021 18:24 UTC