<p>The UK strain was recently found among the recent cluster of cases that emerged in entertainment venues in Thonglor.</p>

<p>Dr Yong said it is unlikely that the strain had been brought in by people coming via official channels because everybody is tested and quarantined for 14 days.</p>

<p>He said Cambodia is still struggling with infections, and it is likely that migrant workers or Thais sneaking across the border may have been carriers of this strain, which is 1.7 times more infectious.</p>

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Virologist believes British strain of Covid-19 brought in from Cambodia

Judging by the fact that the UK strain of the Covid-19 virus has affected more than 1,500 people in Cambodia since February 20, expert virologist Dr Yong Poovorawan believes it may have been brought into Thailand by people crossing the border.