A Health Department survey found that about one-third of more than 3,000 respondents did not use separate knives and chopping boards to handle raw food and cooked food, which could spread infectious disease. Another 30 per cent admitted they failed to wash their hands after touching public installations or equipment while 10 per cent did not wash hands after coughing or sneezing. The survey was conducted from December 2005 to January 2006. But there were encouraging signs as more than 90 per cent were adopting good personal hygiene practices. This included washing hands after going to the toilet and before eating or handling food and after handling rubbish. And roughly the same proportion of respondents followed good food hygiene practices, such as cooking meat thoroughly, storing raw food and cooked food separately, and properly washing food. The proportion of people using serving chopsticks or spoons when having meals with others also rose significantly from 46 per cent in 2003 to 65 per cent in 2005. Assistant Director of Health Regina Ching Cheuk-tuen said people should strictly observe hygiene measures to minimise the risk of contracting communicable diseases.