Studies in macaques have shown that neutralizing antibodies can offer robust protection from infection with a simian counterpart of HIV, yet these studies have also suggested that high concentrations of antibodies are required for efficient protection. Unfortunately, it's not generally thought to be feasible to elicit such high neutralizing antibody titers by vaccination. Dennis Burton and his colleagues now show that lower concentrations of antibodies can offer protection to macaques if a repeated low-dose challenge model is used—a model that may better recapitulate the acquisition of infection in humans.
- Ann J Hessell
- Pascal Poignard
- Dennis R Burton