What is a negative pressure isolation ward? What are the advantages of this type of ward?

Negative pressure isolation ward is a ward where the air pressure inside the ward is lower than the air pressure outside the ward. In terms of air circulation, only fresh air from outside can be sent into the ward through layers of filtration, and the contaminated air in the ward will not be leaked out by the patients, but will be discharged to a designated location through a special channel with special disinfection and purification. So that the place outside the ward will not be contaminated, thus effectively reducing cross-infection, the most suitable for the treatment of highly contagious respiratory disease patients. At present, the domestic professional do negative pressure ward, general air is one of them.