Protective efficacy of a monovalent oral type 1 poliovirus vaccine

  • 13/07/2007

  • Lancet

We are shocked and dismayed that The Lancet should have published the paper on the protective efficacy of monovalent oral type 1 poliovirus vaccine by Nicholas Grassly and colleagues (April 21, p 1356),1 having overlooked the serious ethical issues. (Correspondence) involved.