Asthma risk News
Governments need to investigate ways of reducing emissions on the roads, particularly trucks using diesel.
Exposure to certain bacteria around the house – mainly those found in house dust – during infancy, was also associated with a reduced risk.
Asthma is a lung condition in which a person's airways become inflamed, narrow and swell and produce extra mucus.
In addition, children born with a low birth weight were more susceptible to the respiratory effects of air pollution, the study showed.
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