Menu Close

Articles on Blood

Displaying 1 - 20 of 65 articles

Researchers can test blood samples taken for other reasons to see if patients have previously had COVID-19. Don Bartletti/Los Angeles Times via Getty Images

COVID-19 official counts can miss mild cases – here’s how serosurveys that analyze blood for signs of past infection can help

Your blood can hold a record of past illnesses. That information can reveal how many people have had a certain infection – like 58% of Americans having had COVID-19 by the end of February 2022.
Her deep breath has to get to the baby. electravk/Moment via Getty Images

How does a baby ‘breathe’ while inside its mom?

A fetus needs oxygen long before its lungs work and it’s exposed to the air. Some ingenious biochemistry explains how the mother’s blood delivers it.

Top contributors

More