In Tuesday night's "Your Health," the need for blood is critical, as cold weather across the country is creating a supply shortage.
It's so bad, elective surgeries in the Chicago area may have to be rescheduled.
LifeSource is the city's largest blood services supplier.
It has lost more than 400 units of blood in the last two days because of weather cancellations.
Nationwide, the American Red Cross has lost nearly 14,000 blood and platelet donations.
To schedule your appointment at an upcoming local drive, call the American Red Cross at 1-800-RED-CROSS.
There is now proof the medical benefits of yoga are not a stretch.
A new study shows after six months of yoga, breast cancer survivors reduced fatigue by 57 percent and inflammation up to 20 percent.
Scientists at the Ohio State University analyzed 200 blood samples from breast cancer survivors over five years.
It is the largest study of yoga ever.
Survivor Sue Cavanaugh says the practice works for her.
"It's a great way to learn how to really relax and not let the cancer rule the world, which I was really determined I wasn't going to let cancer rule my life anyway," she said.
Researchers intentionally followed women who had never done yoga before so they could truly gauge its impact.