Učinkovitost cepiva Prevenar pri preprečevanju akutnega vnetja srednjega ušesa (AOM) so preučevali v randomizirani dvojno slepi klinični študiji na 1. 662 finskih dojenčkih, cepljenih bodisi s cepivom Prevenar bodisi s kontrolnim cepivom (cepivo proti hepatitisu B) v starosti 2, 4, 6 in 12- 15 mesecev.
Efficacy of Prevenar against acute otitis media (AOM) was assessed in a randomised, double blind, clinical trial of 1,662 Finnish infants immunised with either Prevenar or a control vaccine (Hepatitis B vaccine), at 2, 4, 6 and 12-15 months of age.