Thinking about some low frequency, high impact Thailand horror stories, it's not easy to find out (references welcome):

• what happens if you test positive? 2nd confirming test possible?
• what happens if you test negative, but, say, someone in your airplane row or van to the hotel tests positive?
• Likely costs for hospital or quarantine hotel stay?

I found out recently that the travel insurance offered by the Chase Sapphire Reverse credit card excludes Cambodia.