An important feature of WHP’s operations is the call center that is particularly useful for cases that require aggressive follow-up over long periods as in tuberculosis treatment or antenatal care. The call center based in Patna currently handles case registrations, product placement, reimbursement of claims, client satisfaction, and alerts. The call center also oversees the functioning of the interactive voice response (IVR) system that WHP uses to deal directly with clients, both for demand generation and treatment adherence. The financial settlement feature of the call center has led to other projects in different parts of the country availing the service.