Prevention is better than cure because there are many diseases and conditions which have no cure. There are also some chronic diseases which do not have complete cure and can cause poor quality of life due to disabilities, e.g, congestive heart failure, chronic renal failure, stroke etc.
Prevention is always better than cure because for preventing we will not pay money it comes on its wish but for curing the disease like malaria , swine flu, chicken pox etc.., we may spend lakhs ...really prevention is better than cure...