27 August 2021. Cambodia is expected to ramp up the administration of third or the booster dose of COVID-19 vaccines now that the Ministry of Health has laid out clean guidelines on who and what vaccines will be used.https://www.khmertimeskh.com/50924242/cambodias-administration-of-3rd-booster-dose-of-covid-19-vaccines-expected-to-be-ramped-up/