About the Authors

Albert Jan van Hoek

albert.vanhoek@lshtm.ac.uk

Affiliations Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, Keppel street, WC1E 7HT, London, England, Immunisation, Hepatitis and Blood Safety Department, Public Health England, 61 Colindale Avenue, NW9 5EQ, London, England

Elizabeth Miller

Affiliation Immunisation, Hepatitis and Blood Safety Department, Public Health England, 61 Colindale Avenue, NW9 5EQ, London, England

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AJVH EM. Performed the experiments: AJVH. Analyzed the data: AJVH. Wrote the paper: AJVH EM.