If my child is not meeting the milestone. What should I do? Please seek the advice of your doctors/nurses during the scheduled developmental assessment of your child. Related articles I received a push notification from HealthHub informing that my child has upcoming vaccinations. What should I do? When I click on Growth Charts, the system displays the error U0011. What does it mean? I received a push notification from HealthHub informing that my child has missed vaccinations. What should I do? I cannot enter my child's birth information, developmental milestones and growth chart on HealthHub web portal. Why? I would like my child to have his Immunisation at my General Practitioner’s Clinic. Can I cancel my Immunisation appointment?