| http://www.w3.org/ns/prov#value | - Comparison between the incidence of VPDs before national vaccination recommendations were issued and the rate in 2006 show that the number of cases of diphtheria, measles, paralytic poliomyelitis, rubella, congenital rubella syndrome, and smallpox dropped by more than 99%.5 Nevertheless, vaccination rates remain suboptimal for adults and children, with particularly low levels in some impoverished
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