National serosurvey of vaccine preventable diseases

The serosurvey is based on blood test results of children aged 6-15 years and adults aged from 16-70 years. The study from 2005 to 2007 measures immunity derived from vaccination or past infection. This information is helpful in determining the potential for future epidemics, potential age groups at risk, the need for public health intervention, and evaluation of vaccine specific programmes.