Novel influenza A(H1N2) seasonal reassortant identified in a patient sample, Sweden, January 2019

In January 2019, a human seasonal reassortantinfluenza A(H1N2) virus with a novel 7:1 genetic constellationwas identified in a 68-year-old female patient with suspected pneumonia. The virus harbouredA(H3N2) neuraminidaseand remaining genes from A(H1N1)pdm09. The patient recovered after severe illness. No additional cases have been detected. This is the second identified A(H1N2) seasonal reassortantin a human in Europe within 1 year; a previous case was detected in the Netherlands in March 2018.