Mandatory hotel quarantine's expected to begin later this week for air passengers from 33 countries.

There's concern that 1,200 people from 'high risk' countries arrived here in the 3 weeks after the Government signed-off on the plan.

Mandatory hotel quarantine means they'll have to stay in a hotel for 14 days, or face a fine or jail time for breaking the law.

The Social Democrats Co-Leader Catherine Murphy says the Government's been dragging its heels on bringing it in: