Fig. 5

Co-administration of FluA and FluB DMAb protects mice from lethal influenza A/B challenge and homologous re-challenge. BALB/c mice received both FluA and FluB DMAb. Separate mice were treated with both FluA plus FluB protein monoclonal antibody. Mice received initial infection with either influenza A/California/7/2009 or B/Florida/4/2006. a Total human IgG levels in mice sera at the time of infection (n = 8 animals per group, mean ± SD). b Influenza A-specific and B-specific human IgG in mouse serum at the time of infection quantified by HA binding ELISA (n = 8 animals per group, mean ± SD). c, d Kaplan–Meier survival curves following initial infection with A/California/07/2009 (c) or B/Florida/4/2006 (d) (n = 10 animals per group, *p ≤ 0.0001 Flu DMAb versus control DMAb). e, f 28 days following initial infection, surviving mice received homologous influenza re-infection. Kaplan–Meier survival curves following re-infection, compared to mice receiving neither DMAb/IgG treatment nor initial infection (naïve). (Number of animals in each group are shown)