1. Scientists from NASA's Jet Propulsion Laboratory (JPL) have released the blueprint, via an open-source license, for a wearable that warns users against touching their faces to help cut the risk of COVID-19 transmission. 2. The PULSE is essentially a pendant, worn around the neck between six inches and one foot from the head. 3. It can detect when a person’s hand is approaching their face using an IR-based proximity sensor. A vibration motor then shakes out an alert, and the response becomes stronger as hand gets closer to face. 4. JPL’s PULSE has the advantage of being effective now in terms of building positive habits will limit the spread of COVID-19, as well as other viral infections.