Two days earlier, he had returned from a bvacation/b in Mexico. He presented with fever up to 40° C, cough and dyspnoea. Headache and myalgia were not present. In addition, this patient had an unrelated, previously undiagnosed chronic disease. b..../b Sequencing primer set C was rapidly provided by Metabion, bMartinsried/b, Germany. TaqMan-PCR system D, specific for the new influenza A(H1N1) strain was designed by M. Panning, Freiburg, and C. Drosten, Bonn, and kindly provided by ...