With as much as 66 out of the 115 infected with Covic-19 being imported cases who then went on to infect locals with cluster infections, the government has ordered the mandatory quarantine of all incoming people into Cambodia.
This includes all border entries such as land, water ways, sea ports and airports through which many infected victims have come through.
Some had suppressed their symptoms with self-medication and were later tested positive but after having been in contact with locals. Among the Cambodians infected this way are two drivers, tour guides and a hotel manager.
In full: https://www.bangkokpost.com/world/1895725/cambodia-orders-mandatory-quarantine-for-all-incoming-passengers