About the Authors

Bruno Frederico
Ricardo Milho
Janet S. May
Laurent Gillet

Current address: Immunology-Vaccinology, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.

Philip G. Stevenson


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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PGS BF RM. Performed the experiments: PGS BF RM JSM LG. Analyzed the data: PGS BF RM JSM LG. Wrote the paper: PGS.