SARS Prevention   Voice-over: U-shaped water traps should be filled with enough water and disinfected regularly. Otherwise, cockroaches, foul air and viruses can enter your premises. Every week, put a teaspoon of household bleach solution into about half a litre of water. It then becomes 1:99 diluted bleach for pouring into the floor drain outlet. Spray insecticide into the drain outlet after cleaning. Make sure drains and pipes don't leak and aren't blocked. Don't alter them without authorisation. Repair a defect in the trap immediately.   Keep water in your U-shaped water traps.     Endsuper: Vigilant and Prepared   www.info.gov.hk/info/sars   SARS Hotline: 187 2222   Health, Welfare and Food Bureau