| Name | Info | Provider | Link |
|---|---|---|---|
| COVID-19 Vaccines | free resource | MedlinePlus Health Information | https://medlineplus.gov/covid19vaccines.html |
| free resource | SMW supporting association (Trägerverein Swiss Medical Weekly SMW) | https://doi.org/10.4414/smw.2021.20523 | |
| Full text from | free resource | Zurich Open Access Repository and Archive | https://doi.org/10.5167/uzh-215757 |
| free resource | scite Smart Citations | https://scite.ai/reports/34010428 |