A. Peralta Santos

Comparative complete scheme and booster effectiveness of COVID‐19 vaccines in preventing SARS‐CoV‐2 infections with SARS‐CoV‐2 Omicron (BA.1) and Delta (B.1.617.2) variants: A case–case study based on electronic health records

B. Nunes, J. P. Almeida, B. Nunes, 2022, medRxiv.

SARS-CoV-2 BA.5 vaccine breakthrough risk and severity compared with BA.2: a case-case and cohort study using Electronic Health Records in Portugal

J. P. Almeida, J. Isidro, V. Borges, 2022, medRxiv.

Omicron (BA.1) SARS-CoV-2 variant is associated with reduced risk of hospitalization and length of stay compared with Delta (B.1.617.2)

J. P. Almeida, E. Fernandes, J. Isidro, 2022, medRxiv.