The document provides instructions for performing CPR on an infant in 4 steps: 1) Shout and gently tap the infant to check responsiveness before beginning CPR; 2) If unresponsive, give 30 chest compressions at 100 compressions per minute, pressing down one-third the depth of the chest; 3) Open the airway using head tilt and lifting of the chin; 4) Give 2 gentle 1-second breaths by covering the mouth and nose, continuing cycles of compressions and breaths until help arrives.