Invasive Haemophilus influenzae Serotype e and f Disease, England and Wales
Shamez N. Ladhani , Sarah Collins, Anna Vickers, David J. Litt, Carina Crawford, Mary E. Ramsay, and Mary P.E. Slack
Author affiliations: Health Protection Agency, London, UK (S.N. Ladhani, S. Collins, A. Vickers, D.J. Litt, C. Crawford, M.E. Ramsay, M.P.E. Slack); St. George’s University of London, London (S.N. Ladhani)
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