About the Authors
- Stefan Flasche, Albert Jan Van Hoek, Elizabeth Sheasby, Pauline Waight, Nick Andrews, Elizabeth Miller
- Immunisation, Hepatitis and Blood Safety Department, Health Protection Agency, London, United Kingdom
- Stefan Flasche
- Department of Mathematics and Statistics, Strathclyde University, Glasgow, United Kingdom
- Carmen Sheppard, Robert George
- Respiratory & Systemic Infection Laboratory (RSIL), Health Protection Agency, London, United Kingdom
RG and CS have received support from Wyeth vaccines (now Pfizer) for conference attendance. SF, PW, AJVH, ES, NA, and EM declare no competing interests.
Analyzed the data: SF NA. Wrote the first draft: SF AJVH EM. Wrote the manuscript: SF AJVH LS PW CS RG EM. ICMJE criteria for authorship read and met: SF AJVH LS PW CS RG EM NA. Agree with the results and conclusions: SF AJVH LS PW CS RG EM NA. Designed the study: AJVH NA EM. Oversaw the field work: LS. Database design and study data management: PW. Culture and serotyping: CS RG.