Objective:

to estimate usage and wastage of multi-dose and single-dose vaccine vials in the Metropolitan Region of Porto Alegre, Rio Grande do Sul, Brazil, from 2015 to 2017.

Methods:

a descriptive study was carried out based on secondary data from the National Immunization Program Information System (SIPNI) and the Strategic Health Supplies Information System (SIES).

Results:

a total of 12,342 records were examined; mean wastage rate was 45.8% (95%CI 39.5;51.7), while usage rate was 54.2% (95%CI 48.3;60.5); vaccines with the highest mean annual wastage rate were MMR (68.8% - 95%CI 66.5;71.1), BCG (68.1% - 95%CI 65.4;70.7), Hepatitis B (56.4% - 95%CI 53.0-59.7) and Yellow Fever (55.9% - 95%CI 51.4;60.4).

Conclusion:

the highest rates of vaccine wastage were for multi-dose vials; although single-dose vaccines also exceeded the acceptable limit defined by the World Health Organization.

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