Persistent detection of Zika virus RNA in semen for six months after symptom onset in a traveller returning from Haiti to Italy, February 2016 Nicastri, Emanuele and Castilletti, Concetta and Liuzzi, Giuseppina and Iannetta, Marco and Capobianchi, Maria R and Ippolito, Giuseppe, Eurosurveillance, 21, 30314 (2016), https://doi.org/10.2807/1560-7917.ES.2016.21.32.30314