Effectiveness of COVID-19 vaccines against severe COVID-19 among patients with cancer in Catalonia, SpainLazar Neto F, Mercadé-Besora N, Raventós B, Pérez-Crespo L, Castro Junior G, Ranzani OT, Duarte-Salles TJun 19, 2024Ranzani OTGroup LeaderI am an epidemiologist.