Figure 3.

Estimated and extrapolated prevaccination median age of rotavirus-positive hospital admissions in children aged <5 years, by country. Lighter red represents younger median age and darker red represents older median age. If >1 study was conducted within a country, the median of median ages was used. If no data were available for a country, the median age was extrapolated (indicated by diagonal shading) using the median age of the under-5 mortality stratum. Abbreviations: GRSN, Global Rotavirus Surveillance Network; RVGE, rotavirus gastroenteritis. The map is reprinted with permission from the World Health Organization.