Phát âm chuẩn – Anh ngữ đặc biệt: Allergy Fighting Material (VOA)

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Many people around the world suffer from dust-related allergies. People with allergies have trouble breathing or suffer from tightness in the chest and shortness of breath. Some allergies result from very small animals called dust mites. Dust mites live in bedding. Now, scientists in Poland say they have successfully tested cloth that blocks the microscopic animals. Most of us share our beds with thousands of dust mites. Each mite is just one-third of a millimeter wide. Along with dust around the home, we breathe in waste from these creatures. The waste contains enzymes called proteases. They produce chemical reactions in the body which can lead to breathlessness, coughing or severe asthma attacks. Dust mites are hard to remove because they can easily pass through small openings in bedding. But that is not the case with the new material developed at the Medical University of Lodz in Poland. Air can pass through the material but dust mites cannot. People who tested the cloth say their allergic symptoms were greatly reduced. They say they can finally sleep normally. Researchers say repeated washings did not reduce the anti-allergic quality of the new fabric. More testing must be done before the material will be ready for market. Until then, people who suffer from dust allergies are advised to keep their homes dry, clean their floors often and wash their bed sheets in hot water.

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