References
Dellepiane, N., Griffiths, E. and Milstien, J. B. (2000) New challenges in assuring vaccine quality, Bulletin of the World Health Organization, 78 (2), pp. 155–62.
Lancet Infectious Diseases Newsdesk (2002) Drug companies asked to deliver on a low-cost menigitis vaccine, The Lancet Infectious Diseases, 2, p. 650.
Taylor, L. H., Latham, S. M. and Woolhouse, M. E. J. (2001) Risk factors for human disease emergence, Philosophical Transactions of the Royal Society of London B, 356, pp. 983–989.
WHO (2001) Yellow Fever Fact Sheet 100, http://www.who.int/ mediacentre/ factsheets/ fs100/ en/ index.html [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] (last accessed December 2001).