The World Health Organization's expert group on immunization said on Friday it recommended that countries consider introducing Sanofi's dengue vaccine Dengvaxia in areas where prevalence of the virus was 50 percent or higher.
Vaccination should be done between the ages of nine and 11, but efficacy improved as people got older, Jon Abramson, chairman of the WHO's Strategic Advisory Group of Experts on immunization (SAGE) told a news conference in Geneva.
The vaccine needs to be administered in a three-dose series and SAGE does not recommend its use before 9-years-old, which it said was . . .
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