Christou-Ergos M, Sabahelzain MM, Bolsewicz KT, Kaufman J, Steffens M, Danchin M, Leask J Full text General surveillance Immunisation coverage Social research Special risk groups Surveillance 2026 Description Vaccine 2026;88:128846. doi: 10.1016/j.vaccine.2026.128846 (Epub) 1 view