Final answer:
To aid a choking infant, perform back slaps and chest thrusts, and if the obstruction remains, perform the Heimlich maneuver on older individuals. Always seek emergency care if the steps do not alleviate the choking.
Step-by-step explanation:
To perform back slaps and chest thrusts on an infant who is choking, first make sure the infant is positioned face-down on your forearm, with their head lower than their chest. Administer five firm back slaps between the infant's shoulder blades with the heel of your hand. If the object is not dislodged, turn the infant face up, maintaining their head lower than their chest. Place two fingers in the middle of the infant's chest and administer five quick chest thrusts. For an older person, encourage them to cough, and if that fails, give hard back slaps. If the obstruction persists, you may need to perform the Heimlich maneuver. Detailed instructions can be found in online instructional videos.
If back slaps, chest thrusts, and the Heimlich maneuver do not resolve the choking, it is crucial to call for emergency medical care immediately.