Background: The test-negative design is an increasingly popular approach for estimating
vaccine effectiveness (VE) due to its efficiency. This review aims to examine published test …

Background We examined the influence of some factors on seasonal influenza vaccine
effectiveness (VE) from test-negative design (TND) studies. Methods We systematically …

Background Seasonal influenza can circulate in parallel with coronavirus disease (COVID-
19) in winter. In the context of COVID-19 pandemic, the risk of co-infection and the burden it …

ABSTRACT A vaccine represents the most promising strategy for combatting the COVID-19
pandemic through primary prevention. No study has been reported on the acceptability of …

Background Several aggregate data meta-analyses have provided estimates of the
effectiveness of influenza vaccination in community-dwelling elderly people. However, these …

Influenza is a respiratory disease caused by the influenza virus, which is highly
transmissible in humans. This paper presents a systematic review and meta-analysis of …

Influenza is prevalent globally, leading to severe morbidity and mortality. During the
pandemic, knowledge, attitude, and practice (KAP) towards influenza virus and vaccination …

Both the Northern and the Southern Hemisphere annual WHO influenza vaccine
recommendations are designed to ensure vaccine delivery before the winter-time peak of …

Background: Vaccination against seasonal influenza is usually very protective. However,
coverage in service workers is low due to the large population density and high turnover …

Background To promote influenza vaccination coverage, a Chinese megacity, Shenzhen
provides free influenza vaccination to its residents aged 60 years and above through …