Pulmonary function tests are a group of noninvasive breathing tests that measure how much air your lungs can hold, how quickly you can move air in and out and how efficiently your lungs transfer ...

It’s best to test for RSV soon after your symptoms start. That’s because you’ll likely have the most virus in your system then. As you get better, the amount of virus will go down. (Photo Credit: ...

When you breathe out, you’re not just releasing carbon dioxide. Your breath carries a complex mix of volatile organic compounds, or VOCs—tiny molecules that come from normal body processes. These ...