End of season 2022/2023 quadrivalent influenza vaccine effectiveness in preventing influenza in primary care in Portugal

• Main Authors: Irina Kislaya (Author), Ana Rita Torres (Author), Licínia Gomes (Author), Aryse Melo (Author), Ausenda Machado (Author), Camila Henriques (Author), Nuno Verdasca (Author), Raquel Guiomar (Author), Ana Paula Rodrigues (Author), National Influenza Surveillance Network (Author)
• Format: Book
• Published: Taylor & Francis Group, 2023-12-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

ABSTRACTUsing a test-negative case-control design, we aim to estimate influenza vaccine effectiveness (VE) against medically attended laboratory-confirmed influenza in Portugal in 2022/2023 season. Between week 41/2022 and week 14/2023, data on 592 patients with influenza-like illness aged 18 or mor...