A normal oxygen level in the blood is between 95 per cent and 100 per cent.
In an attempt to save lives, the NHS
bought hundreds of thousands of oximeters (oxygen monitors) for patients with Covid-19 to use at home
.
The Covid Oximetry at Home service was
set up by NHS England as a way of making sure patients vulnerable to coronavirus are monitored at home and any deterioration picked up and treated quickly, increasing their chance of recovery.
Once a person tests positive for Covid-19, the test-and-trace service notifies their GP, which enables them to refer eligible people into the service