With each heartbeat, blood courses through your body. Some traverse arteries from the lungs back to the heart, and some navigate through capillaries in the thinnest layers of your eyelid, almost ...

Memory T cells are a special type of white blood cell that "remember" past infections and vaccines, helping our bodies to ...

Air travel may feel routine, but the changes inside an aircraft cabin can quietly stress your heart. Experts explain what happens to your body when you fly and how to stay safe in the air.

Flying puts significant strain on your cardiovascular system due to reduced cabin pressure, lower oxygen levels, and dry air. Your heart works harder, blood thickens, and immobility slows circulation, ...