Samples amplified by WTA representing 7 different types of clinical samples were labelled and hybridized to the LLMDA ( Figure 3 and Table 2 ). Microarray data was analysed using the maximum likelihood method developed at LLNL [19, 20] , with additional stringencies applied. In 14 out of 14 clinical samples, the expected virus was detected: HSV1, HSV2, HPV16, HPV6/ 16/53/61, BKV, JCV, Rota A, Astrovirus, Sapovirus, Dengue 1, HCV in duplicate, EV and RSV (Table 2) . For the RSV + sample, a detection threshold equal to the 95 th percentile of control probes had to be used for detection. For this sample we also used the data analysis developed at SSI, where RSV was detected using a detection threshold equal to the 99 th percentile of random control probes (data not shown). Moreover, using this approach on all samples, we generated the same result as seen with the maximum likelihood method (data not shown). For the double-positive faeces sample containing both Astro-and Sapovirus, only Astrovirus was detected by the microarray analysis. In the negative control no viruses were detected.