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comparativement a 21 % des 244 sujets t´ moins, soit un taux ` e d’efficacit´ pour le vaccin de 70 % (ic de 95 % entre 36 et 86 %). e dans une etude cas/t´ moins a laquelle ont particip´ 89 patients ´ e ` e hospitalis´ s pour une bact´ ri´ mie a pneumocoques, on n’a observ´ e e e ` e aucune diff´ rence entre les deux groupes dans le taux de vaccination e ou dans la r´ partition des s´ rotypes responsables.
the results of the first year revealed no significant difference between the two groups in the number of cases of pneumonia or deaths per 1,000 patient-years. this study is susceptible to volunteer bias and only a two-fold or greater difference in incidence would have been detected given the sample size.
Last Update: 2015-05-14
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