Dr Elaine Vickers, Research Relations Manager at Asthma UK, says: 'There are a few studies which suggest that the chemicals present in indoor swimming pools, like chlorine, may be involved in the development or worsening of asthma and other allergic conditions. This is due to the fact that the chemicals in the water may compromise protective cell barriers within the lungs, meaning people with allergic asthma are more vulnerable to allergens.
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