About the Authors

Christopher M. Smith

Affiliation Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom

Michael B. Gill

Affiliation Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom

Janet S. May

Affiliation Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom

Philip G. Stevenson

To whom correspondence should be addressed. E-mail: pgs27@cam.ac.uk

Affiliation Division of Virology, Department of Pathology, University of Cambridge, Cambridge, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PS CS. Performed the experiments: CS JM MG. Analyzed the data: PS CS MG. Wrote the paper: PS.