Lack of exercise is a well-known risk factor for conditions such as cardiovascular disease, diabetes and certain forms of cancer. But some research also suggests that physical inactivity should be ...

The respiratory system allows air to reach the lungs, from which oxygen enters the blood and circulates to all body cells. This system also removes waste gases from the body and helps prevent disease ...

The CDC estimates there have been over 1,500 deaths from flu so far this year. Respiratory illness activity – a measure of how often conditions like the common cold, flu, COVID-19, and respiratory ...