Since 1999, WOSEM CO., LTD. We are providing professional engineering technology necessary for effective prevention of high-risk pathogens such as 'MERS' and 'COVID-19' to government agencies, public hospitals, research laboratories, and others. We are expanding our business to medical device development and manufacturing areas in the biosafety field. Our Portable Negative Unit, which proved its unrivaled competitiveness during the ‘MERS’ outbreak in 2015 by being used by National Medical Center, converts a general room into a Negative Pressure Isolation Room(NPIR) with a simple installation and a low price. We developed ‘Negative Pressure Carrier’ and ‘Negative Pressure Isolating Wheelchair’ which prevents secondary infection while transporting confirmed or suspected cases of high risk pathogens. These products has been used for dealing with COVID-19 in the front line of quarantine in South Korea and was supplied to other countries through an ODA project by KOICA. Our negative pressure devices can be checked and controlled by the user’s smartphone through the Network System. The reason we could develop innovative and remarkable medical devices is based on our accumulated engineering skills in biosafety field since 1999. WOSEM has been and will do the best for public safety.