Table 1.
Summary characteristics of included studies.
| Number of papers | |
|---|---|
| Selected publications by type | |
| Study type | |
| Retrospective cohort | 30 |
| Prospective cohort | 24 |
| Review | 10 |
| RCT | 10 |
| Cross-sectional | 3 |
| Case-control | 2 |
| Before/after | 1 |
| Selected publications by location | |
| Continent | |
| North America | 35 |
| Europe | 15 |
| South America | 7 |
| Asia | 6 |
| Africa | 2 |
| Australia | 0 |
| Multiple | 9 |
| Selected publications by vaccine | |
| Vaccine | |
| Influenza | 37 |
| Yellow fever | 5 |
| Tdap | 4 |
| Rubella | 4 |
| Varicella | 2 |
| Group B streptococcus | 2 |
| Hepatitis | 2 |
| HIV | 2 |
| Pneumococcal | 2 |
| HPV | 1 |
| Cholera | 1 |
| Cytomegalovirus | 1 |
| Herpes simplex | 1 |
| Meningococcal | 1 |
| Polio | 1 |
| Rabies | 1 |
| Respiratory syncytial virus | 1 |
| TT | 1 |
| Multiple | 5 |