U.S. President Donald Trump delivers remarks at the 101st American Farm Bureau Federation (AFBF) Annual Convention and Trade Show. (USDA photo) President Donald Trump in an executive order published ...

If you have trouble breathing, your doctor may recommend a few tests to figure out what’s causing it. Some measure how much air you breathe in or out or how much oxygen is going from your lungs to the ...

A pulse oximeter measures blood oxygen levels at home and in healthcare settings. Abnormally low readings on a pulse oximeter might require medical care, especially if they are below 92%. Skin color ...