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<div class="bt_bb_wrapper"><p><span style="font-weight: 400;">Asthma occurs when the airways swell and narrow and produce extra mucus. The swelling can make breathing difficult and may </span></p></div>… <a href="https://chestmed.com.sg/2020/12/18/asthma-what-are-the-common-triggers/" class="read-more" target="_blank">Read the rest </a>