The goal of this observational study is to investigate if VR game-based educational intervention can enhance primary schoolchildren's compliance with hygiene practices to prevent the transmission of SARS-CoV-2 and other upper respiratory pathogens in the community. The main questions the study aims to answer are, after receiving the VR game-based education intervention: * Does VR game-based educational intervention improve hygiene-practice compliance in primary schoolchildren? * What are the bacterial loads on primary schoolchildren's hands? * What are the rates of infections caused by SARS-CoV-2 and other respiratory viruses in primary schoolchildren? Researchers will compare the interventional group to the control group to see if VR game-based educational intervention can enhance primary schoolchildren's hygiene practices. Participants will * Receive in a training programme on hygiene practices through playing VR games for two weeks, 1 hour per week. * Do a questionnaire on hygiene knowledge before and after receiving the education programme * Provide hand swabs and saliva samples before and after receiving the education programme
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Change from baseline in the compliance with hygiene practices immediately after intervention
Timeframe: Day 0, Month 1, Month 2
Change from baseline in the number of participants who comply with hand washing procedures immediately after intervention
Timeframe: Day 0, Month 1, Month 2
Change from baseline in the number of bacteria on the hands of the participants immediately after intervention
Timeframe: Day 0, Month 1, Month 2
Change from baseline in the vaccination uptake rates by the participants immediately after intervention
Timeframe: Day 0, Month 1, Month 2