A new variant, XEC, is emerging in the United States, according to a tracker on the Center for Disease Control's website. The KP.3.1.1 variant, part of the Omicron family, has been the strain ...

For patients facing a rare disease, a genetic test isn’t the end of their story; it’s often just the beginning. A test result may point to a diagnosis, or it may reveal a genetic variant that we have ...