Roche Holding AG received CE Mark approval for its Elecsys Apolipoprotein E4 (ApoE4) biomarker test, an in vitro diagnostic immunoassay to identify the ApoE4 gene variant from a blood sample. With APOE4 considered as the strongest genetic risk factor for developing Alzheimer’s disease, the test provides a fast, reliable way to determine whether an individual carries the genetic variant without the need for DNA‑based genotyping.