Figure 1. 1st-round of RT-PCR assay, amplification and sequence analysis of unusual pneumonia outbreak in Wuhan. (A) RNA samples were subjected to SARS-CoV specific RT-PCR primer sets as indicated, only the SAR1-s/as set showed obvious band. Lane 1, 6, 11, 16, 21 are samples of patient 1. Lane 2, 7, 12, 17, 22 are samples of patient 2. Other lanes are samples of other patients who are irrelevant to this study. (B) The Blast result of PCR products of patient 1 and 2.