It is better to stop something bad from happening instead of dealing with it after it has happened.

इलाज से बेहतर है रोकथाम

English Usage: "Vaccination campaigns emphasize that prevention is better than cure."

Hindi Usage: "टीकाकरण अभियान इस बात पर ज़ोर देते हैं कि रोकथाम इलाज से बेहतर है।"