A worker shows used anti-dengue vaccine Dengvaxia inside a vaccine storage room in Sta. Cruz city, Metro Manila, Philippines December 4, 2017. REUTERS/Romeo Ranoco
(Reuters) - The World Health Organization said on Monday it hopes to review safety data on Sanofi's dengue vaccine this month, while the Philippines ordered an investigation of its now suspended massive immunization programme after the French drugmaker said it could actually worsen the disease in some cases.
The safety fears involve possible increased risk to people who had not previously been exposed to the dengue virus prior to vaccination with Dengvaxia.
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