The eHealth System (Subsidies) [eHS(S)] was designed to facilitate administration and monitoring of the Elderly Health Care Voucher (EHV) Scheme and Vaccination Subsidy Schemes (VSS). It is a web-based system through which vouchers under the EHV Scheme are issued and used, obviating the need for paper-form vouchers. Elders can also check their voucher balance and obtain the list of participating healthcare service providers by accessing the system through internet or by telephone. For VSS, eHS(S) enables healthcare service providers to check patients' vaccination records prior to vaccination so as to prevent duplicated dose and enhance patient safety.