<p>In late 2019, a novel coronavirus emerged in China. Since then, it has rapidly spread throughout the world. This novel coronavirus is called SARS-CoV-2 and the disease that it causes is called COVID-19.</p><p><br></p><p>While some with COVID-19 have a mild illness, others may experience difficulty breathing, pneumonia, and even respiratory failure. Older individuals and those with underlying health conditions are most at riskTrusted Source for serious illness.</p><p><br></p><p>You may have heard a lot recently about using <a href="https://www.prpatch.com/" rel="noopener noreferrer" target="_blank" style="color: rgb(40, 148, 199); background-color: transparent;"><a href="https://www.prpatch.com/" target="_blank">face masks</a></a> to prevent infection. Masks can be divided into industrial, <a href="https://www.prpatch.com/product" rel="noopener noreferrer" target="_blank" style="color: rgb(40, 148, 199); background-color: transparent;"><a href="https://www.prpatch.com/" target="_blank">medical</a></a>, and civilian according to the user category.</p><p><br></p><p class="ql-align-center"><img src="https://img80003244.weyesimg.com/uploads/prpatch.com/images/15862491141752.jpg" alt="masks" height="253" width="800"></p><p><strong>Industrial masks</strong></p><p>Usually implement the American standard starting with N95, N90, etc., or the European standard starting with FFP; the national standard of Chinese masks is GB2626-2006, which is suitable for industrial masks. The filtration rate of KN90 is required to be greater than or equal to 90%, and the filtration rate of KN95 is required to be greater than or equal to 95%. Medical masks that meet the B19083-2003 standard are suitable for medical personnel and related personnel. It is used to protect airborne respiratory infections. The key to respiratory protection is to prevent bacteria and fine particles.</p><p>
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