Among many other diseases, respiratory infection accounts for 23.3-42.1% of the total hospital infections [11] , and is listed as the third leading killer [12] . However, present diagnosis procedures using nasal swabs, bronchoalveolar lavages, nasopharyngeal aspirates or sputum samples, appear to cause unpleasant experiences in addition to long detection time. During flu outbreaks, body temperature or isolation procedures are often used to control and prevent further spread, however such methods are lacking scientific evidence and not always effective with those patients infected but in latent period. On another front, exhaled breath condensate (EBC) as a simple and noninvasive method is increasingly being utilized in early disease screening and infectious aerosols measurements, e.g., lung cancer [13, 14] , asthma [15, 16] , and other respiratory problems [17, 18] . In previous studies, human influenza A viruses were detected in exhaled breath using EBC [19, 20] as well as filter [21] , mask [22, 23] and a liquid sampler [24] . In another study, foot-and-mouth disease viruses were also found in the exhaled air from experimentally infected cattle [25] . In addition, high levels of bacterial concentrations in EBC were also observed in other studies [26] [27] [28] [29] . It was recently shown that exhaled breath could be also analyzed for fungal infection by relevant biomarker, e.g., 2-Pentyl furan (2PF) for aspergillosis [30] . Overall, EBC has demonstrated great potential and advantages in early disease screening and diagnosis [31] , opening a new arena for studying airway inflammation and chemistry [32] . Recently, Vereb et al (2011) suggested that exhaled breath can be also used for assessing a variety of environmental exposures [33] .