Antiviral screening of linear venom peptides (100 µM in the assay) from the ants M. rubra and M. ruginodis against four strains of influenza virus in MDCK II cells using the CellTiter-Glo assay. We used the strains A/Hamburg/5/09 (H1N1), A/Hessen/1/03 (H3N2), B/Malaysia/2506/04 (Victoria lineage), and B/Massachusetts/71 (Yamagata lineage). Infected, untreated cells were used as negative controls (no protective effect), and uninfected cells, as well as cells treated with aprotinin, were used as positive controls (100% protection). The peptides are identified by their short names. All measurements were performed as triplicates. Values were normalized to the aprotinin control. Boxplots indicate 0.25, 0.5, and 0.75 percentiles with 1.5 interquartile range.