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Fig. 3 | BMC Medicine

Fig. 3

From: Risk factors affecting COVID-19 vaccine effectiveness identified from 290 cross-country observational studies until February 2022: a meta-analysis and meta-regression

Fig. 3

Vaccine effectiveness against severe COVID-19 after full immunization. Pooled and adjusted vaccine effectiveness against severe COVID-19 for investigated predictors with VE density displayed in truncated violin plots after full mRNA and AdV immunization, including the minimum 50% VE threshold set by WHO [32]; AdV adenoviral vector vaccine, VE vaccine effectiveness, HCW healthcare worker, HRG high-risk group (individuals living in long-term care or residential homes); *p<0.05; **p<0.01; ***p<0.001; ****p<0.0001

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