A new study has suggested jobless and unmarried Hongkongers are most at risk of dying during a cold snap, as temperatures plummet across the city.There should be a better protocol on public health education to target vulnerable residents with these two high-risk factors, who were up to 60 per cent more likely to die when there was a drop in temperatures, the report warned.Tuesday was officially the coldest day of the year, with temperatures dropping to 10.8 degrees Celsius (51.44 degrees…
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