Many patients with severe cases of Covid-19 have been shown to have extremely low levels of oxygen in the blood. Others who have tested positive find themselves experiencing shortness of breath.

Typically clipped over a finger (though a toe or ear lobe works, too), a pulse oximeter transmits light from sensors on one side of the device through the body part to sensors on the other side. In ...

Consumer Reports has no financial relationship with advertisers on this site. One of the most isolating and scary aspects of the coronavirus pandemic is that people who have COVID-19 or suspect they ...

The #CoronavirusFacts database records fact-checks published since the beginning of the COVID-19 outbreak. The pandemic and its consequences are constantly evolving and data that was accurate weeks or ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. (CNN) — Many patients with severe cases of ...