<prompt> Most common complication of chickenpox in children:EncephalitisSecondary bacterial infectionPneumoniaOtitis media  <response>: b. Secondary bacterial infectionRef: Nelsons 20e p 1579-1585 Ghai 8e p 214-215Secondary bacterial infections of skin, by group A Streptococcus S. aureus, may occur in children with varicella. 