Current estimates are that over 14 million Americans have been infected with COVID-19. That number is growing exponentially due to uncontrolled spread of a virus that frequently presents asymptomatically, allowing healthy looking people to pass on the infection.
Every cell in your body needs oxygen in order to live. When we inhale, our lungs bring in oxygen and other gases. Once in the lungs, oxygen is moved into the bloodstream and carried to every cell. And when we exhale, our lungs get rid of carbon dioxide, which is a waste gas.