RT Journal Article SR Electronic(1) A1 Trifonov, V A1 Khiabanian, H A1 Greenbaum, B A1 Rabadan, R YR 2009 T1 The origin of the recent swine influenza A(H1N1) virus infecting humans JF Eurosurveillance VO 14 IS 17 SP 19193 OP DO https://doi.org/10.2807/ese.14.17.19193-en UL https://www.eurosurveillance.org/content/10.2807/ese.14.17.19193-en