At univariate Cox analysis, variables which met the criterion of p<0.20 were age (0.029), sex (0.072), cancer (<0.001), influenza infection (0.168), haemoglobin (<0.001), platelet count (0.066), C-reactive protein peak (0.028) and angiotensin-converting enzyme inhibitors or angiotensin receptor blockers prescription (0.132), in addition to statin intake (0.040). Here, ACE is linked to influenza.