A Belgian study has found that children who swim in indoor swimming pools have a raised risk of wheezing and asthma. The researchers found that for each extra swimming pool per 100,000 people, asthma rates in an area go up by two to three percent. The study was carried out by scientists at the Catholic University of Louvain, Belgium. It is thought that this could be due to chlorine build-up in indoor pools, which don't have the ventilation of outdoor pools. [click link for full article]
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