Due to the asymptomatic nature of the majority of COVID-19 infections, a lot of coronavirus patients may suffer from abnormally low-levels of blood saturation without even realising it (dropping below 92 per cent)

Due to the asymptomatic nature of the majority of COVID-19 infections, a lot of coronavirus patients may suffer from abnormally low-levels of blood saturation without even realising it (dropping below 92 per cent)