A blood biobank allows scientists to study the immune responses to the coronavirus among infected Biogen employees and their contacts.

The functional, respiring organelles appear to be present in the blood of healthy people, but their function is yet unclear.

Bats that share food with their hungry cage-mates stay close after being released.

A device that illuminates and oxygenates blood outside of the body before pumping it back in removes the gas by freeing hemoglobin from CO.

For the Physiology or Medicine award, Peter Ratcliffe, William Kaelin, and Gregg Semenza are credited with figuring out molecular and genetic responses to oxygen levels.

The physician and researcher challenged the Chinese government over her findings of widespread hepatitis and HIV contamination during blood collection.

The birds also decrease their heart rate and chill their blood to maintain flight in hypoxic conditions.

The finding overturns the idea that the insect’s first victims were bats and reveals that certain species started targeting humans as a side snack, not as a main meal.

A mouse study finds that when blood platelets are activated during exercise, they release factors that increase the number of newborn neurons in the hippocampus.