Table 1.

Study interventions

Activity	Intervention group (IG)†	Control group (CG)
Baseline survey*
Randomisation*
Home visit 0	Rapport formation; information	Rapport formation; information
Community discussion 1	Project introduction; sharing district report card; skit (vaccination); toll-free number (vaccination)	Project introduction; sharing district report card; skit (ORS); toll-free number (vaccination)
Home visit 1	Story 1 (Key messages) Timely vaccination can save children from life-threatening illnesses (polio) In case of queries, one should ask a local CHW (or use the toll free number) Activity: immunisation schedule
Home visit 2	Story 2 (New messages) Vaccination is free of charge and available at the local Anganwadi centre Activity: protect immunisation card
Home visit 3	Story 3 (New messages) Every vaccine has a specific purpose and all doses are required Challenges occur in daily life, but one should avoid missing a vaccination dose Even if the child has a minor illness, she or he can be vaccinated Activity: immunisation schedule
Community discussion 2	Discussion of barriers to immunisation and local solutions; toll-free number (vaccination); activities: immunisation calendar; immunisation card; skit (vaccination)	Discussion of barriers to early child nutrition and local solutions; toll-free number (vaccination); activities: skit
Home visit 4	Story 4 (New messages) Place the right priority on vaccination—if one's child falls ill, one will incur expense and health risk Activity: immunisation card
Home visit 5	Story 5 (New messages) In case of service delivery problems, tell a responsible person (or use the toll-free number) If a child's vaccine dose is missed, obtain it at the next opportunity Activity: immunisation card
Home visit 6	Story 6 (New messages) Vaccination benefits everyone (herd immunity) Activity: immunisation schedule
Community discussion 3	Feedback on project components (home visits, community discussions, toll-free number); suggestions for improvement	Feedback on project components (home visits, community discussions, toll-free number); suggestions for improvement
Endline survey*

*Identical for IG and CG.

†Key messages were repeated for reinforcement; only new content is described.

CHW, community health worker; ORS, oral rehydration salts.