21 December 2021. Cambodian Minister of Health said the ministry was monitoring all exits and entries into the Kingdom in order to quickly detect and isolate anyone infected with the Omicron coronavirus variant by following strict procedures for all travelershttps://www.thestar.com.my/aseanplus/aseanplus-news/2021/12/21/cambodia-keeps-eye-on-all-entries-and-exits-in-order-to-control-omicron-variant .