Author

A. Machado

3 papers indexed here

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Open access Aug 2026

Influenza Vaccine Effectiveness Against Mild and Severe Outcomes: A Comparison Study in Portugal

Influenza vaccination is an effective public health intervention to lessen influenza effect on healthcare and has been recommended to prevent severe outcomes. Previous studies present higher influenza vaccine effectiveness (IVE) estimates against primary care medically attended (outpatients) compared to hospitalised ca...

Francisco Mourao, Verónica Gómez, P. Soares et al. · Influenza and Other Respirat... · 0 citations

Open access Jul 2026

Adapted XBB.1.5 vaccine effectiveness against severe COVID-19 outcomes among immunocompromised persons in 2023-24 in six European countries: a VEBIS-EHR network study.

BACKGROUND We estimated the XBB.1.5 vaccine effectiveness (VE) against COVID-19 hospitalization and death in Belgium, Denmark, Italy, Portugal, Spain (Navarre), and Sweden following the 2023-24 fall vaccination campaign among immunocompromised persons (ICPs). RESEARCH DESIGN AND METHODS We conducted a multi-country r...

A. Blake, J. Humphreys, K. Olson et al. · Expert Review of Vaccines · 0 citations

Open access Jul 2026

Impact of autumn 2023 and 2024 COVID-19 vaccination in preventing COVID-19 related hospitalisations and deaths in seven EU/EEA countries: a VEBIS-EHR network study

Background: Within the VEBIS-EHR project, monthly vaccine effectiveness (VE) of COVID-19 vaccines is routinely estimated across EU/EEA countries. While VE quantifies direct protection, it does not capture the overall population benefit of vaccination campaigns in terms of severe outcomes prevented. Aim: To estimate the...

Y. Mansiaux, A. Blake, N. Nicolay et al. · medRxiv · 0 citations