The Hong Kong University of Science and Technology (HKUST) has commissioned HKPORI to conduct this survey targeted at Hong Kong residents aged 18 or above to measure behaviour change before and during the pandemic. The questionnaire takes about 20 minutes to complete. Please click here to fill in the questionnaire. This link is for your use only, please do not share it. As a token of appreciation, the research team will pay $25 each to the first 1,000 respondents who would satisfactorily complete the whole survey.