Countries currently categorised as extremely or very high risk will be consolidated into a new top tier labelled as “high risk”, while those currently deemed high- and medium-risk will be merged into a new medium-risk tier that will include most countries.

With the new measures kicking in next Monday, the Post unpacks what you need to know about the latest rules.

In general, what rules have been relaxed or tightened?

All arrivals must show a negative Covid-19 test taken 72 hours before their flight. In the past, some vaccinated travellers were exempted from the requirement.

Under the new measures, only fully vaccinated Hong Kong residents can fly in from high-risk countries, such as Britain, the Philippines and Indonesia.

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Mass Covid-19 testing under way across China amid rising infections fuelled by Delta variant

Mass Covid-19 testing under way across China amid rising infections fuelled by Delta variant

Fully vaccinated non-residents can enter the city from medium-risk countries, such as Singapore, Japan and the United States. Previously, only non-residents – regardless of vaccination status – who arrived from low-risk countries, namely Australia and New Zealand, were allowed to do so.