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At about 6 months old, your baby will begin to show a strong preference for you and other people who constantly care for him. As he distinguishes you from others, he becomes wary of strangers. This is "stranger anxiety". He will learn that you are a safe and secure base from which he can explore the world. Therefore, a constant care figure is important during this period.

Your baby will be able to:1

  • Localize the source of soft noise produced on either side
  • Reach out and grasp objects
  • Show interest in colourful pictures
  • Roll over from tummy to back and reverse
  • Start to develop stranger anxiety


The fifth scheduled visit of primary vaccinations is at six months of age. This is the final set of vaccinations within the primary series that are given at two, four, and six months. The gap between the doses of vaccines is to make sure that each dose has time to work effectively. Your baby will again receive one injection for prevention against diphtheria, tetanus, acellular pertussis and poliomyelitis. Additionally, there is one more injection as a third dose vaccination against Hepatitis B.2

The Government will provide free or subsidised seasonal influenza vaccination to eligible children of age between 6 months and less than 12 years. Parents can arrange subsidised vaccination for their children in clinics of private doctors enrolled in the Vaccination Subsidy Scheme or Seasonal Influenza Vaccination School Outreach participated by their schools. Please consult your doctor for further information.3



  1. Family Health Service. Child Health. Child Development 4 – Four to Seven Months (FHS-C4A 2019). Available at  [Accessed Apr 2021]
  2. Family Health Service. Child Health. Schedule of Hong Kong Childhood Immunisation Programme. Available at [Accessed Apr 2021]
  3. Centre for Health Protection. 2020/21 seasonal influenza vaccination programmes to launch in October. (2020). Available at [Accessed Apr 2021]