Issues in pressure control of negative pressure isolation wards

The spring and autumn are the high risk seasons for H5N1 avian influenza and other respiratory infection to seriously outbreak. All provinces and large cities are preparing or have prepared emergent negative pressure isolation wards to collect the possible infected patients in China. But so far there is no official published design and construction code for negative pressure isolation wards in China. Based on the criterions of both domestic and the foreign design guideline, tests two infectious disease hospitals (one is newly built, the other is rebuilt), sums and analyses the issues in the design and construction process of negative pressure control system for this kind of isolation wards and presents some suggestions.