In the last few decades, human life has been threatened by the sequential emergence of a number of unknown infectious and non-treatable diseases, such as human immunodeficiency virus (HIV), severe acute respiratory syndrome (SARS) as well as real strains of influenzas. However, many studies presented that frontline health-care workers, nurse, who have the most opportunity to provide primary care to patients with a potentially lethal infectious disease are themsevelves at high risk of contracting the disease. The experience learned from the SARS outbreak studies have evidenced...