Because EBV and CMV (i) are known to encode a viral homologue of IL10 and because we observed that (ii) serum IL10 level was highly correlated with EBV viraemia in the whole cohort since the first week in ICU, it was hypothesised that cellular IL10 may contribute to the specific EBV and CMV behaviour in sepsis as compared to other pathologies. The gene discussed is IL10; the disease is Sepsis.