About the Authors

Parashar Pravin Ramanuj

p.ramanuj@doctors.org.uk

Affiliation Reference Microbiology Service, Public Health England, London, South London, United Kingdom; and Maudsley NHS Foundation Trust, London, United Kingdom

Julia Granerød

Affiliation Virus Reference Department, Public Health England, London, United Kingdom

Nicholas W. S. Davies

Affiliation Department of Neurology, Chelsea & Westminster Hospital, London, United Kingdom

Stefano Conti

Affiliation Statistics, Modelling and Economics Department, Public Health England, London, United Kingdom

David W. G. Brown

Affiliation Virus Reference Department, Public Health England, London, United Kingdom

Natasha S. Crowcroft

Affiliation Public Health Ontario, Ontario, Canada

Competing Interests

Parashar Pravin Ramanuj, Julia Granerød, Nicholas WS Davies are members of the Professional Advisory Panel of the Encephalitis Society. Parashar Pravin Ramanuj received a travel bursary from the Encephalitis Society to present this work at an international meeting of the International Encephalitis Consortium. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JG DWGB NSC. Performed the experiments: PPR JG NWSD SC DWGB NSC. Analyzed the data: PPR JG NWSD SC. Contributed to the writing of the manuscript: PPR JG NWSD SC DWGB NSC. Contributed to the acquisition of data: JG NWSD. Co-ordinated the study: JG DWGB NSC.