Over 90% of traffic policeman in the southern Chinese city of Guangzhou suffered nose or throat infections caused by dirty air, the
report quoted the Guanzhou Hospital of Vocational Disease Control as saying.
A survey of eight cities found that police officers who had worked the streets for more than 20 years were the most at risk.
Pollution was the chief culprit, but stress, traffic noise and standing long periods in the sun were also to blame.
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