Lee et al[42] compared 63 hospitalised severe H1N1pdm09 patients to 53 individuals with seasonal influenza and found evidence of an hyper-activated pro-inflammatory response characterised by elevated IL-6, and a suppressed adaptive Th1/Th17 response, with reduced CXCL-10, IFNγ and elevated IL-10. Here, CXCL10 is linked to influenza.