Seroprevalence and trend of dengue cases admitted to a government hospital, delhi - 5-year study (2006-2010): a look into the age shift.

Abstract

We observed an increase in the dengue positive cases every alternate year, thereby indicating a possible role of herd immunity in northern India. We did not find a steady increase in the number of cases over 5 years. We found an increase in the number of positive cases in children and young adolescents.