Effectiveness of CoronaVac primary series with and without booster against hospitalized COVID-19 during the Omicron-predominant epidemic wave in the Philippines: a test-negative case–control study

Effectiveness of CoronaVac primary series with and without booster against hospitalized COVID-19 during the Omicron-predominant epidemic wave in the Philippines: a test-negative case–control study

Background CoronaVac (Sinovac) was initially effective against symptomatic COVID-19 and severe outcomes, but its performance against the immune-evasive Omicron variant remains uncertain. This study evaluated the effectiveness of CoronaVac against hospitalized COVID-19 among Filipino adults during th...

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Bibliographic Details
Main Authors: Kristal An Agrupis, Michelle Ylade, Yang Yang Qi, Maria Vinna Crisostomo, Jedas Veronica Daag, Gianne Lariz Magsakay, Jude Raphael Lo, Kiarah Louise Florendo, March Helena Jane Lopez, Jayne Marie Enriquez, Irish Lobitaña, Gretchen Bonita Ranada, Regina Alfonso, Mitzi Marie Chua, Mitzie Lou Osabel, Mary Ann Igoy-Bacay, Carren Anne Bocaling, Lorenz Von Seidlein, Xuanyi Wang, Jacqueline Deen
Format: Article
Language:English
Published: Taylor & Francis Group 2025-12-01
Series:Expert Review of Vaccines
Subjects:
COVID-19
CoronaVac
Sinovac
inactivated vaccines
vaccine effectiveness
SARS-CoV-2
Online Access:https://www.tandfonline.com/doi/10.1080/14760584.2025.2539889
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