In a recent paper, researchers were able to quantify preventive mass vaccination campaigns (PMVC) to reduce yellow fever outbreaks at the province level using the self-controlled case series (SCCS) method.
During this study period, an estimated 22% to 45% of outbreaks were averted by PMVCs in Africa.
Moreover, this study published by PLOS on February 18, 2021, observed a puzzling U-shaped association between vaccination coverage and the risk of an outbreak in the cohort analysis.
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