Trend in Vaccination Coverage in children aged zero to 12 months – Piauí, Brazil, 2013-2020

Abstract

The study aimed to analyze the temporal trend of Vaccination Coverage (VC) in children from 0 to 12  months of age. This is an ecological time series study  of VC in children aged 0 to 12 months, Piauí, from  2013 to 2020, using data from the National  Immunization Program Information System. The  Prais-Winsten autoregressive model was used to  estimate the VC trend for eight immunobiologicals.  Trends were categorized as decreasing, increasing, or  stationary. There was a reduction in the VC of all  immunobiologicals. There was a decreasing trend in  the VC of Hepatitis B (annual percentgage change  [APC] = -4.5; 95%CI: -7.3; -1.6), Meningococcal C (APC  = -1.7; 95%CI: -3.1; -0.2), Pentavalent (APC =  -4.2; 95%CI: -7.0; -1.3) and Yellow Fever (APC = -3.2;  95%CI: -5.9; -0.5); and stationary values for BCG (APC  = -2.5; 95%CI: -5.7; 0.9), Human Rotavirus (APC = -1.5;  95%CI: -3.2; 0.2), Pneumococcal (APC -0.7;  95%CI: -2.7; 1.3); and Poliomyelitis (APC = -2.1; 95%CI:  -5.3; 1.1). It was concluded that with the  decreasing and stationary trends of VC, it is necessary  to develop public policies to clarify and recruit the  population about vaccination in children from 0 to 12  months of age.