Article content

As lion dancers snaked between conference room tables laden with plastic bottles, pens, notebooks and laptops, some staff from British gas analytics firm Servomex snapped photos of the performance meant to bring good luck and fortune.

But the January sales meeting in a luxury Singapore hotel was far from auspicious.

We apologize, but this video has failed to load.

tap here to see other videos from our team. Try refreshing your browser, or Coronavirus crisis: Who is Singapore's 'patient zero,' and how will frantic health authorities find them? Back to video

Someone seated in the room, or in the vicinity of the hotel that is renowned for its central location and a racy nightclub in the basement, was about to take coronavirus global.

Three weeks later, global health authorities are still scrambling to work out who carried the disease into the mundane meeting of a firm selling gas meters, which then spread to five countries from South Korea to Spain, infecting over a dozen people.

Experts say finding this so-called “patient zero” is critical for tracing all those potentially exposed to infection and containing the outbreak, but as time passes, the harder it becomes.