A room access control system including a base attachable to a wall or door jamb adjacent a door opening to a room, an arm having a first end pivotally mounted to the base and having a second end, illuminated warning indicia positioned on the arm,wherein the arm is positionable in a first position wherein the arm is in a generally vertical, undeployed position with the second end of the arm positioned above a floor located beneath the base and adjacent the door opening, andwherein the arm is pivotable from the first, generally vertical undeployed position, to a second generally horizontal, deployed position, where the arm extends across the door opening.