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Comparison of population densities in the Indian subcontinent and Africa show that in highly populated areas even an 80% vaccine coverage will still leave a density of susceptibles high enough to maintain the disease, a finding with important implications for other vaccine campaigns.<\/jats:p>","DOI":"10.1017\/s0022172400066249","type":"journal-article","created":{"date-parts":[[2009,10,19]],"date-time":"2009-10-19T08:50:36Z","timestamp":1255942236000},"page":"459-466","update-policy":"http:\/\/dx.doi.org\/10.1017\/policypage","source":"Crossref","is-referenced-by-count":33,"title":["Impact of population density on immunization programmes"],"prefix":"10.1017","volume":"96","author":[{"given":"I.","family":"Arita","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Wickett","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Fenner","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2009,10,19]]},"reference":[{"key":"S0022172400066249_ref022","unstructured":"Would Health Organization (1968). 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