Sky News' Tom Cheshire visits Wuhan in China, one year after COVID-19 was noticed as a 'novel pneumonia' and the pandemic began.
The first reports from China of an unusual pneumonia in December 2019 worried Professor Chuang Yin-ching.
Prof Chuang is regional commander for Taiwan's Infectious Disease Prevention and Treatment Network, established after the SARS outbreak of 2003.
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