Sanofi warns dengue vaccine less safe than previously thought
French drugmaker Sanofi (Euronext: SAN) says it expects to take a post-tax hit of about 100 million euros ($118 million) after new safety data showed its dengue vaccine Dengvaxia could be harmful to those not previously infected with the disease.
As a result, the company says it will request authorities slim down its label to ensure that vaccination is not recommended for those who have not been infected in the past.
Based on up to six years of clinical data, Sanofi found that patients of this type could suffer more cases of severe disease upon a subsequent dengue infection.
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