Pt briefly lost consciousness approx. 10-15 minutes post vaccination. Witnessed by mother and clerical staff. Medical staff called to lobby. Pt awake and alert appearing pale. No s/s of respiratory distress noted. O2 saturation 99%. Pulse:77. BP:108/82 with pt moving arm frequently. Pt assessed by APN. Pt ambulatory with steady gait, interactive with staff, and pallor greatly improved just a few minutes after incident. Dc’d home with mother.