The Lancet

Extended data 1. Acknowledgement of genomes used in phylogenetic analysis of Influenza C virus isolates (related to Fig 1) Extended data 2. Differentially expressed genes across clinical samples from known virus-positive subjects, virus-negative subjects, and subjects discovered in a biomarker-based screen for undiagnosed infections (related to Figure 2) Extended data 3. Acknowledgement of genomes used in phylogenetic analysis of SARS-CoV-2 isolates (related to Fig 3)