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Changes in Meningococcal Strains in the Era of a Serogroup C Vaccination Campaign: Trends and Evolution in Belgium during the Period 1997–2012
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Cost-effectiveness of seasonal influenza vaccination in pregnant women, health care workers and persons with underlying illnesses in Belgium
Economic evaluation of pneumococcal vaccines for adults aged over 50 years in Belgium
Pneumococcal serotypes in children in 4 European countries