Effectiveness of the CoronaVac vaccine in older adults during a gamma variant associated epidemic of covid-19 in Brazil: test negative case-control study

Aging, Immunity, and COVID-19: How Age Influences the Host Immune Response to Coronavirus Infections?

(2021) Varnica Bajaj et al.   Frontiers in Physiology

Characterisation of the first 250 000 hospital admissions for COVID-19 in Brazil: a retrospective analysis of nationwide data

(2021) Otavio T Ranzani et al.   Lancet Respiratory Medicine

Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials

(2021) Merryn Voysey et al.   LANCET

Safety, tolerability, and immunogenicity of an inactivated SARS-CoV-2 vaccine (CoronaVac) in healthy adults aged 60 years and older: a randomised, double-blind, placebo-controlled, phase 1/2 clinical trial

(2021) Zhiwei Wu et al.   LANCET INFECTIOUS DISEASES

BNT162b2 mRNA Covid-19 Vaccine in a Nationwide Mass Vaccination Setting

(2021) Noa Dagan et al.   NEW ENGLAND JOURNAL OF MEDICINE

SARS-CoV-2 variants B.1.351 and P.1 escape from neutralizing antibodies

(2021) Markus Hoffmann et al.   CELL

Theoretical framework for retrospective studies of the effectiveness of SARS-CoV-2 vaccines

(2021) Joseph A. Lewnard et al.   EPIDEMIOLOGY

Genomics and epidemiology of the P.1 SARS-CoV-2 lineage in Manaus, Brazil

(2021) Nuno R. Faria et al.   SCIENCE

Effectiveness of the Pfizer-BioNTech and Oxford-AstraZeneca vaccines on covid-19 related symptoms, hospital admissions, and mortality in older adults in England: test negative case-control study

(2021) Jamie Lopez Bernal et al.   BMJ-British Medical Journal

Effectiveness of the Pfizer-BioNTech COVID-19 Vaccine Among Residents of Two Skilled Nursing Facilities Experiencing COVID-19 Outbreaks — Connecticut, December 2020–February 2021

(2021) Amadea Britton et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Prevention of Coronavirus Disease 2019 (COVID-19) by mRNA-Based Vaccines Within the General Population of California

(2021) Kristin L Andrejko et al.   CLINICAL INFECTIOUS DISEASES

Single-dose mRNA Vaccine Effectiveness Against Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), Including Alpha and Gamma Variants: A Test-negative Design in Adults 70 Years and Older in British Columbia, Canada

(2021) Danuta M Skowronski et al.   CLINICAL INFECTIOUS DISEASES

Efficacy and safety of an inactivated whole-virion SARS-CoV-2 vaccine (CoronaVac): interim results of a double-blind, randomised, placebo-controlled, phase 3 trial in Turkey

(2021) Mine Durusu Tanriover et al.   LANCET

Age-related immune response heterogeneity to SARS-CoV-2 vaccine BNT162b2

(2021) Dami A. Collier et al.   NATURE

COVID-19 in Amazonas, Brazil, was driven by the persistence of endemic lineages and P.1 emergence

(2021) Felipe Gomes Naveca et al.   NATURE MEDICINE

Effectiveness of Covid-19 Vaccines against the B.1.617.2 (Delta) Variant

(2021) Jamie Lopez Bernal et al.   NEW ENGLAND JOURNAL OF MEDICINE

Effectiveness of an Inactivated SARS-CoV-2 Vaccine in Chile

(2021) Alejandro Jara et al.   NEW ENGLAND JOURNAL OF MEDICINE

Evaluation of post-introduction COVID-19 vaccine effectiveness: Summary of interim guidance of the World Health Organization

(2021) Minal K. Patel et al.   VACCINE

COVID-19 hospital admissions: Brazil's first and second waves compared

(2021) Leonardo SL Bastos et al.   Lancet Respiratory Medicine

Neutralisation of SARS-CoV-2 lineage P.1 by antibodies elicited through natural SARS-CoV-2 infection or vaccination with an inactivated SARS-CoV-2 vaccine: an immunological study

(2021) William M Souza et al.   Lancet Microbe

An interactive web-based dashboard to track COVID-19 in real time

(2020) Ensheng Dong et al.   LANCET INFECTIOUS DISEASES

Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

(2020) Merryn Voysey et al.   LANCET

Influenza Vaccine Effectiveness in the United States during the 2015–2016 Season

(2017) Michael L. Jackson et al.   NEW ENGLAND JOURNAL OF MEDICINE

Rotavirus vaccine effectiveness in low-income settings: An evaluation of the test-negative design

(2017) Lauren M. Schwartz et al.   VACCINE

Theoretical Basis of the Test-Negative Study Design for Assessment of Influenza Vaccine Effectiveness

(2016) Sheena G. Sullivan et al.   AMERICAN JOURNAL OF EPIDEMIOLOGY

Analysis of matched case-control studies

(2016) Neil Pearce   BMJ-British Medical Journal

Analysis of matched case-control studies

(2016) Neil Pearce   BMJ-British Medical Journal

Effectiveness of quadrivalent human papillomavirus vaccine for the prevention of cervical abnormalities: case-control study nested within a population based screening programme in Australia

(2014) E. Crowe et al.   BMJ-British Medical Journal

The test-negative design: validity, accuracy and precision of vaccine efficacy estimates compared to the gold standard of randomised placebo-controlled clinical trials

(2013) G De Serres et al.   Eurosurveillance