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UnknownLong term bivalent mRNA vaccine effectiveness against COVID-19 hospitalisations and deaths in Portugal: a cohort study based on electronic health records.

Background

In Autumn 2022, there were recommendations for a COVID-19 booster vaccination with adapted bivalent vaccines to eligible population. Evaluating vaccine effectiveness (VE), in a short period after the vaccination, is key to guide public health decisions on the vaccine performance, ...
S-EPMC12020219 | biostudies-literature
UnknownSARS-CoV-2 introductions and early dynamics of the epidemic in Portugal.

Background

Genomic surveillance of SARS-CoV-2 in Portugal was rapidly implemented by the National Institute of Health in the early stages of the COVID-19 epidemic, in collaboration with more than 50 laboratories distributed nationwide.

Methods

By applying recent phylodynamic models th...
S-EPMC9053228 | biostudies-literature
UnknownCross-sectional study on protective antibodies against influenza A virus subtypes and cross-protection against influenza A(H3N2) subclade K, Portugal, August 2025.
The 2025/26 season was marked by co-circulation of influenza A subtypes, with the first detection of A(H3N2) subclade K in September 2025. In August 2025 in Portugal, 14.8% (95% CI: 12.2-17.8) of 886 persons tested had cross-protective antibodies against this subclade. The overall seroprevalence aga...
S-EPMC12905529 | biostudies-literature
UnknownDeath following pulmonary complications of surgery before and during the SARS-CoV-2 pandemic.

Background

This study aimed to determine the impact of pulmonary complications on death after surgery both before and during the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic.

Methods

This was a patient-level, comparative analysis of two, international prospect...
S-EPMC10364875 | biostudies-literature
UnknownA prognostic model for use before elective surgery to estimate the risk of postoperative pulmonary complications (GSU-Pulmonary Score): a development and validation study in three international cohorts.

Background

Pulmonary complications are the most common cause of death after surgery. This study aimed to derive and externally validate a novel prognostic model that can be used before elective surgery to estimate the risk of postoperative pulmonary complications and to support resource allo...
S-EPMC12056793 | biostudies-literature
UnknownSARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study.

Background

Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling.

Methods

The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death ...
S-EPMC7995808 | biostudies-literature
UnknownTiming of surgery following SARS-CoV-2 infection: an international prospective cohort study.
Peri-operative SARS-CoV-2 infection increases postoperative mortality. The aim of this study was to determine the optimal duration of planned delay before surgery in patients who have had SARS-CoV-2 infection. This international, multicentre, prospective cohort study included patients undergoing ele...
S-EPMC8206995 | biostudies-literature
UnknownSARS-CoV-2 infection and venous thromboembolism after surgery: an international prospective cohort study.
SARS-CoV-2 has been associated with an increased rate of venous thromboembolism in critically ill patients. Since surgical patients are already at higher risk of venous thromboembolism than general populations, this study aimed to determine if patients with peri-operative or prior SARS-CoV-2 were at...
S-EPMC8652887 | biostudies-literature
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