Enhanced surveillance of initial cases of pandemic H1N1 2009 influenza in Ireland, April - July 2009 Martin, J and O’Donnell, J and Igoe, D and O’Hora, A and Thornton, L and Murphy, N and Cullen, G and Fitzgerald, M and Cotter, S and McKeown, P and O’Flanagan, D and in conjunction with the National Public Health Outbreak Response Team, Collective, Eurosurveillance, 14, 19337 (2009), https://doi.org/10.2807/ese.14.38.19337-en