1. A monitoring system comprising: an infrared imaging module comprising a focal plane array (FPA) configured to capture thermal images of a scene within a field of view (FOV) of the infrared imaging module; a housing at least partially enclosing the infrared imaging module and configured to be positioned to place at least a portion of an infant within the FOV; and a processor in communication with the infrared imaging module and the visible light camera, the processor configured to: track an oronasal region of the infant in the thermal images; analyze thermal data in pixels of the thermal images corresponding to the tracked oronasal region to detect a periodic presence of CO 2 gas imaged in the tracked oronasal region represented by a periodic variation in the thermal data; determine whether the infant is breathing normally based on the analysis of the thermal data in the pixels corresponding to the tracked oronasal region to detect the periodic presence of the imaged CO 2 gas; and generate monitoring information relating to the infant, the monitoring information comprising an alarm generated in response to determining that the infant is not breathing normally.