40
https://pubmed.ncbi.nlm.nih.gov/38092870
The hepatitis B vaccine seroprotection rate is significantly lower in African adolescents aged 15-17 years compared to children under 15 years.
https://pubmed.ncbi.nlm.nih.gov/38092870
The hepatitis B vaccine seroprotection rate is significantly lower in African adolescents aged 15-17 years compared to children under 15 years.