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Consecutive A (H3N2) influenza virus isolates from 2 influenza virus-infected immunodeficient patients treated with amantadine were examined using a novel polymerase chain reaction (PCR)-restriction(More)
We provide evidence that the quasispecies nature (extreme genetic heterogeneity) of foot-and-mouth disease virus is relevant to the virus evading an immune response. A monoclonal antibody(More)