Vaccine

Effectiveness of the TAK-003 dengue vaccine in adolescents during the 2024 outbreak in São Paulo, Brazil: a test-negative, case-control study

Ranzani OT, Lazar Neto F, Mareto LK, ..., Hitchings MDT, Croda J

Jan 1, 2026

Primary SARS-CoV-2 exposure by vaccination or infection shapes immune responses to omicron variants among a Spanish cohort

Ranzani OT, Martín Pérez C, Rubio R, ..., Moncunill G, Dobaño C

Dec 13, 2025

Severity-dependent test-seeking behaviors and test-negative designs: impact on estimated vaccine effectiveness and utility of analytic and design choices

Amin AB, Hitchings MDT, Ranzani OT, Andrews JR, Cummings DAT, Ko AI, Croda J, Dean NE

Aug 27, 2024

#VacinaMare campaign: addressing vaccine inequity in socially vulnerabilised communities

Batista-Da-Silva AA, Bastos LSL, Arouca LE, Gonzaga-Da-Silva TW, Hamacher S, Bozza FA, Ranzani OT

Aug 1, 2024

Vaccination against COVID-19 in a post-pandemic era

Lazar Neto F, Ceccato A, Ranzani OT

Aug 1, 2024

Impact of the first year of COVID-19 vaccination strategy in Brazil: an ecological study

Aguilar S, Bastos LSL, Maçaira P, Baião F, Simões P, Cerbino-Neto J, Ranzani OT, Hamacher S, Bozza FA

Jul 4, 2024

Effectiveness of COVID-19 vaccines against severe COVID-19 among patients with cancer in Catalonia, Spain

Lazar Neto F, Mercadé-Besora N, Raventós B, Pérez-Crespo L, Castro Junior G, Ranzani OT, Duarte-Salles T

Jun 19, 2024

Effectiveness of the fourth dose of COVID-19 vaccines against severe COVID-19 among adults 40 years or older in Brazil: a population-based cohort study

Lazar Neto F, Hitchings MDT, Amin AB, ..., Croda J, Ranzani OT

Jun 1, 2024

Effectiveness of the BNT162b2 mRNA COVID-19 vaccine in children under 5 years

Strumann C, Ranzani OT, Moor J, Berner R, Töpfner N, Chao CM, Moor MB

Nov 1, 2023

Vaccine coverage and effectiveness against laboratory-confirmed symptomatic and severe Covid-19 in indigenous people in Brazil: a cohort study

Pescarini JM, Cardoso AM, Santos RV, Ranzani OT, ..., Barreto ML, Barral-Netto M

Jun 29, 2023