Stranger Anxiety is common after the age of?

Stranger anxiety is a developmental phase experienced by infants and young children. It typically begins between 6 and 9 months of age and peaks between 12 and 15 months. During this time, infants and young children become more aware of their surroundings and start to differentiate between familiar and unfamiliar people. As a result, they may display anxiety or distress when encountering strangers.