Natural immunity to haemophilus influenza B in India; Implications for a pricing policy for the vaccine .
http://books.google.com/books?hl=en&lr=&id=Z222-Oul_VgC&oi=fnd&pg=PA117&ots=8ZpQ4Bra5p&sig=ExPzsrXM1EOVFl5509wLvi9smkM#PPA117,M1 In Focus on Meningitis Research. Editor Phyllis V. Strong Chapter 7, Nova Biomedical Books New York 2004. Pg 117-129.
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