Potka, Jan 26 – Ganga Das, 19 and pregnant for the first time, was determined enough to get her immunisation done at a Public Heath Centre at Juri village of this block in Jharkhand’s East Singhbhum district. Married at the age of 17, Ganga’s determination was a result of an equally determined effort by Unicef and the mobilisers sent out by the state Health Department to spread awareness about routine immunisation and how it helps protect unborn children, creating their first wall of defence against diseases.