… We recommend against the use of self-reported COVID-19 vaccination as the sole source
… Documented vaccination should be used for the primary analysis; self-reported vaccination …

… Survey data reveal public hesitancy about COVID-19 vaccine effectiveness, uncertainty
regarding the protection duration, and apprehension about safety or adverse effects. Critical …

… test for SARS-CoV-2 and at least one Covid-19–like symptom. Controls were defined on
the … persons with Covid-19, we estimated vaccine effectiveness for partial vaccination (assessed …

… Data on the effectiveness of Covid-19 vaccines against clinical outcomes with this variant …
to estimate the effectiveness of two Covid-19 vaccines, BNT162b2 and ChAdOx1 nCoV-19 (…

… vaccine BNT162b2 (Pfizer–BioNTech) has 95% efficacy against coronavirus disease 2019
(Covid-19… Qatar launched a mass immunization campaign with this vaccine on December 21, …

… vaccine effectiveness against Covid-19 shown in this study are lower than results based on
limited phase 3 trial data 18,19 … infections, and vaccine effectiveness against asymptomatic …

… serological and vaccine effectiveness data for extended immunisation schedules in adults
who were prioritised for vaccination during the first phase of the UK COVID-19 immunisation …

… In addition, major news media platforms were searched to track reports from governments
and health authorities around the world evaluating the effectiveness of the COVID-19 vaccine. …

… that COVID-19 vaccination is an important tool for preventing COVID-19 morbidity and …
which to follow future trends in COVID-19 evolution and effectiveness of new and updated …

… COVID-19 vaccine in The Lancet. The trial results show a consistent strong protective effect
across all participant age groups. Also known as Gam-COVID-Vac, the vaccine … coronavirus …