Abstract: A portable lung purger and ventilator system for exhausting airborne contaminants from the lungs, includes a mouthpiece sized and configured for placement at an individual's mouth, the mouthpiece having an inlet for receiving a gas stream and an outlet for transferring a gas stream received through the inlet; a vacuum pump having an inlet in fluid communication with the mouthpiece for receiving a gas stream and an outlet for exhausting a gas stream received through the pump inlet, the vacuum pump generating a vacuum at the mouthpiece; a drive operatively connected with the vacuum pump for providing motive power thereto; a switch operatively connected with the drive for controlling operation thereof; a portable power source operatively connected with the drive for providing power thereto; and the mouthpiece, vacuum pump, drive, switch and power source being arranged in a portable assembly.