What are the mandatory vaccines that an infant should take i.e. 0-12 months?

You can refer to this article for the recommended immunisation schedule for the different types of vaccines (both the compulsory and optional ones are listed in the table): http://www.healthxchange.com.sg/healthyliving/childrenhealth/Pages/Recommended-Immunisation-Schedules-for-Your-Child.aspx A quick summary of the mandatory vaccines for an infant would be: BCG, Hepatitis B, 6-in-1, 5-in-1 and PCV.