Scientific experiments show that children and teenagers are more likely to suffer from respiratory diseases when swimming in swimming pools disinfected with bleach.

Reuters, England reported on June 5438+04 that researchers at Catholic University of Leuven found that chlorine in bleaching powder greatly increased the probability of causing respiratory diseases such as asthma compared with copper and silver ions.

Professor Alfred Bernard, who is in charge of the study, said that chlorine is at least five times more harmful to the respiratory system of children and adolescents than secondhand smoke.

Bernard and his colleagues took 733 teenagers and 1 14 teenagers between 13 and 18 as the research objects respectively. The former swims in the swimming pool with chlorine, while the latter swims in the swimming pool with copper and silver ions most of the time. They found that allergic people in the first group of subjects had a 3-6 times higher risk of hay fever after swimming for more than 100 hours. If you stay in the chlorinated swimming pool for more than 1000 hours, the possibility of allergic rhinitis will increase by 2 to 3 times.