At 4 a.m. Pasadena Police Corporal Cristian Allen prepares for the arrival of the first shift. He wears a mask, gloves and has a table set up with infrared thermometers, alcohol wipes, and hand sanitizer for anyone who needs some. With a quick flick of the wrist, Corporal Allen is able to take the temperatures of the officers, quickly alerting him if they can head out into the field. It’s either a pass or officers are sent home to isolate, self-monitor, or referred to a medical center for testing depending on symptoms. On this Monday morning, everyone…