Nail clubbing, characterized by rounded, thickened, and downward-curved nails, serves as a subtle yet significant indicator ...

The following is a roundup of some of the latest scientific studies on the novel coronavirus and efforts to find treatments and vaccines for COVID-19, the illness caused by the virus.

Researchers have found evidence that low oxygen levels in tumors could actually enhance some of the body's immune responses against cancer, in contrast with the general paradigm that hypoxia ...

(CNN) — Scientists have long known that pulse oximeters are less accurate when used for people with dark skin tones – and now, a new report offers some insight into just how much more inaccurate these ...

A. Common signs include fatigue, pale skin, shortness of breath, dizziness, brittle nails, cold hands and feet, and unusual ...