Lumidigm, part of HID Global, today announced that its multispectral imaging fingerprint sensors, as part of a solution created by VaxTrac, will help to stop vaccine waste at 31 new clinics in southern Benin. The latest version of the VaxTrac system uses fingerprints of both mother and child for more robust identification. The use of fingerprints for vaccine tracking has already become very popular. In a preliminary assessment, the use of biometrics in the vaccination process has led to a 10% increase in the number of women returning to the clinics.