1. World Health Organization. WHO Coronavirus Disease (COVID-19) Dashboard, 9 June 2022. https://covid19.who.int/ (Accessed 10 June 2022)
2. Press Release, “Appointments to Working Group on Implementing the Requirement on Air Change or Air Purifiers in Dine-in Restaurants under Cap. 599F”, Government of the Hong Kong Special Administrative Region, 16 March 2021.
3. A Guide on Compliance with the Requirement on Air Change / Air Purifiers in Seating Areas of Dine-in Catering Premises under Cap. 599F. Food and Environmental Hygiene Department, Government of the Hong Kong Special Administrative Region, April 2021.
4. The Standard, “Yuen Long hotpot cluster infection rises to 12 as HK adds 233 new cases”, 9 May 2022. https://www.thestandard.com.hk/breaking-news/section/4/189975/Yuen-Long-hotpot-cluster-infection-rises-to-12-as-HK-adds-233-new-cases
5. on.cc. “Six more people were confirmed, Sheung Wan eatery cluster increased to 70 confirmed cases”, 18 May 2022. https://hk.on.cc/hk/bkn/cnt/news/20220518/bkn-20220518163107203-0518_00822_001.html (In Chinese)