Have there been cases of corona virus in Khao Lak?

No, I didn’t see any chinese tourists in Khao Lak.

Currently there are no cases of corona virus in Khao Lak or the region of Phang Nga.

More information about the corona virus in Thailand can be found on the following website:
https://en.m.wikipedia.org/wiki/2020_coronavirus_outbreak_in_Thailand

A map also shows the regions in Thailand in which cases of corona virus were confirmed.