Background Patients with severe aortic stenosis (AS) are at high risk of mortality, regardless of symptom status. Despite ...

Sarah D. Sparks is a reporter and data journalist for Education Week who covers the teaching profession and pedagogy for Education Week. She has covered education research and the science of learning ...

Your baby is born with some protection from illness because they get special proteins from their mother called antibodies before they're born. But it's temporary, and the antibodies slowly fade away.