New Apple Watch Measures Blood Oxygen

Blood oxygen readings can be a useful indicator of wellness, but context is important and so is medical advice from a doctor. The new Apple Watch can be summaryse by two words: blood oxygen.
The ability to measure your blood’s oxygen saturation an overall indicator of wellness is the most significant new feature in the Apple Watch Series 6, which was unveiled this week and becomes available on Friday.
The feature is particularly timely with the coronavirus, because some patients in critical condition with Covid-19 have had low blood oxygen levels.
But how useful is this feature for us ?