Skip to main content
Fig. 4 | BMC Medicine

Fig. 4

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. 4

Vaccine effectiveness against any and severe COVID-19 after booster immunization. Pooled and adjusted vaccine effectiveness against any and severe COVID-19 for investigated predictors with VE density displayed in truncated violin plots after booster mRNA immunization, including the minimum 50% VE threshold set by WHO [32]; VE vaccine effectiveness, 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

Back to article page

BMC Medicine

ISSN: 1741-7015

Contact us