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By the end of the first month, your baby will be able to:1

  • Move with jerky, mostly uncoordinated arm thrusting and leg kicking
  • Lift head briefly when lying on her tummy but cannot support head without assistance
  • Keep hands fisted most of the time but can reflexively grasp whatever is placed in her hand
  • Bring hands within range of the mouth and eyes
  • Startled by sudden noises and movements
  • Recognize the scent of mother
  • Smile unselectively at first and then in response to social stimulation

Your baby’s first vaccination after leaving the hospital is scheduled at one month of age. Although this may seem young, it is the best to begin vaccinations early because diseases can be caught at any time and babies have not developed immunity yet. At one month, your baby will receive one injection for protection from Hepatitis B.2

It is important to get vaccinated against Hepatitis B because an individual who is unaware that they have hepatitis B can easily pass the disease on to an unvaccinated child when giving birth (spread from infected mother to baby), through contact with their blood from cuts or sores, or through actions as simple as the sharing of a toothbrush.3

In Hong Kong, since 1988, all newborns would receive the birth dose of vaccination in the hospital. They should receive the second (1-month-old) and third doses (6-month-old) according to schedule of the Childhood Immunization Programme.

After having completed a full course of hepatitis B vaccination, about 90 to 95% of people would gain lifelong protection against infection.4  The vaccination would be recorded in your baby’s Personal Immunization Record.



  1. Department of Health. Family Health Service. Child Development 2 – Birth to First Month. [ONLINE] Accessed on 12 Apr 2021. 
  2. Prevent Communicable Diseases - Get Your Child Vaccinated (Content revised 12/2019). Family Health Service. Department of Health. [ONLINE] Accessed on 12 Apr 2021.
  3. CDC. Hepatitis B Questions and Answers for the Public. 28 July 2021. [ONLINE] Accessed on 12 Apr 2021.
  4. World Health Organization. Hepatitis B Fact Sheet. 27 July 2020. [ONLINE] Accessed on 12 Apr 2021.