there are 3 doses according to agewise. first dose given in 2.5 months, 2nd dose given in 4 months nd 3 dose when required. usually doctors give 2 doses only.

<font color ="#3b5998"><b><a href="http://app.babychakra.com/article/1483">Why You Should Never Miss Your Child's Vaccination? </a></b></font> is a very good read.