Many of the world's airlines were only just taking their first steps towards economic recovery when the Omicron variant was identified in November.
Since then, flight bans and tougher testing rules have dealt another huge blow.
One of the airlines facing enormous challenges is the Hong Kong-based Cathay Pacific.
And questions are now being asked about its ability to survive.
Al Jazeera’s Britt Clennett reports from Hong Kong.
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