Abstract: Exemplary embodiments of smart tags for covertly alerting a service worker to perform a hand hygiene event are disclosed herein. An exemplary smart tag includes a housing, a processor, memory, one or more rechargeable batteries, and a vibrator. The vibrator vibrates the badge and the vibrating badge produces less than 30 decibels of sound. The smart tag further includes a plurality of LEDs. The LEDs illuminate in a first sequence to indicated one of the service worker has washed or sanitized her hands and service worker needs to wash or sanitizer her hands. The smart tag further includes a graphic image that depicts one or more hands.