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Table 2 National serosurvey estimates of measles immunity amongst young adults (born 1968–1982) in Victoria before (1996–9) and after (2002) the young adult measles immunisation program by laboratory

From: Residual susceptibility to measles among young adults in Victoria, Australia following a national targeted measles-mumps-rubella vaccination campaign

  1996–9 serosurvey* 2002 serosurvey
Laboratory Samples tested Percent of all samples tested (%) Percent measles protected by laboratory (%) Samples tested Percent of all samples tested (%) Percent measles protected by laboratory (%) Change in percent protected (%) p-value for change
VIDRL** 45 12.2 88.1 111 34.0 80.5 -7.65 0.2
Lab 2 68 18.4 90.4 46 14.1 80.6 -9.78 0.2
Lab 3 55 14.9 90.1 66 20.2 88.5 -1.62 0.6
Lab 4 40 10.8 86.7 16 4.9 96.9 10.16 0.3
Lab 5 43 11.6 95.7 38 11.7 83.3 -12.41 0.2
Other labs 118 32.0 91.2 5 1.5 80.0 -11.2 0.5
Total 369 100 91.0 282 100 84.2 -6.80 0.006
  1. * 1996–8 serosurvey used for the 1968–80 birth cohort; 1999 serosurvey used for the 1981–2 birth cohort
  2. age-adjusted to the 2002 Australian population
  3. ** Victorian Infectious Diseases Reference Laboratory
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