Cotton rat RSV infection model: lung virus titres reduced prophylactically and therapeutically at 5 mg/kg IM or IV
“Palivizumab was able to reduce the virus titres in the lungs when applied prophylactically or as a treatment for an ongoing infection from approx. 105 to 102 Pfu/gram lung at concentrations of 5 mg/kg after either IM or IV administration.”
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reviewer's view of the efficacy data
EMA: >99% titre reduction for RSV A and B strains at 5 mg/kg and prevention of lung histopathology indicate efficacy
“At the concentration of 5mg/kg the virus titres of group A as well as group B strains of RSV were >99% reduced. Prevention of the formation of histopathological changes in the lung was a further parameter studied, indicating the efficacy of palivizumab.”