ArticleScientific data2020
A cross-country database of COVID-19 testing.
Article in Scientific data, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 312 papers, 6 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
312 citing papers in PubMed, 6 syntheses or guidelines pooled it.
- Global perspectives on challenges, coping strategies, and future preparedness of nursing home staff during COVID-19: a systematic review and meta-synthesis.BMC health services research · 2025Pooled it
- Correlation between SARS-CoV-2 RNA concentration in wastewater and COVID-19 cases in community: A systematic review and meta-analysis.Journal of hazardous materials · 2023Pooled it
- Hydroxychloroquine for Non-Hospitalized COVID-19 Patients: A Systematic Review and Meta-Analysis of Randomized Clinical Trials.Arquivos brasileiros de cardiologia · 2023Pooled it
- The impact of air pollution on COVID-19 incidence, severity, and mortality: A systematic review of studies in Europe and North America.Environmental research · 2022Pooled it
- A systematic review of strategies adopted to scale up COVID-19 testing in low-, middle- and high-income countries.BMJ open · 2022Pooled it
- Changes in cognitive functioning after COVID-19: A systematic review and meta-analysis.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2022Pooled it
- Do Mobile Phone Surveys Supplement Other Mortality Surveillance Methods? Results From a National Study in Bangladesh.Tropical medicine & international health : TM & IH · 2026Article
- Comparing the Risk of SARS-CoV-2 Immune Resistance Evolving Across Regions in the Americas with Differing Approaches to Public Health.Pathogens (Basel, Switzerland) · 2026Article
- CV19global: harmonized epidemiology, policy, mobility and weather indicators from two years and 54 countries.Scientific data · 2026Article
- Article
- Smartphone-Integrated Electrochemical Devices for Contaminant Monitoring in Agriculture and Food: A Review.Biosensors · 2025Review
- COVID-19 infection and severity among childhood cancer survivors in Denmark and Sweden: a register-based cohort study with matched population and sibling comparisons.The Lancet regional health. Europe · 2025Article
- Modeling Antibody Kinetics Post-mRNA Booster Vaccination and Protection Durations Against SARS-CoV-2 Infection.Journal of medical virology · 2025Article
- Saliva Has High Sensitivity and Specificity for Detecting SARS-CoV-2 Compared to Nasal Swabs but Exhibits Different Viral Dynamics from Days of Symptom Onset.Diagnostics (Basel, Switzerland) · 2025Article
- Burden in Colombia of COVID-19 in Adults and the Associated Clinical Characteristics: A Retrospective Database Analysis.Tropical medicine and infectious disease · 2025Article
- Blockchain enabled collective and combined deep learning framework for COVID19 diagnosis.Scientific reports · 2025Article
- Socioeconomic determinants potentially underlying differential global SARS-CoV-2 testing capacity: an ecological study.BMJ open · 2025Article
- Modelling COVID-19 in the North American region with a metapopulation network and Kalman filter.Epidemics · 2025Article
- Article
- What Lessons can Be Learned From the Management of the COVID-19 Pandemic?International journal of public health · 2025Review
252 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Our understanding of the evolution of the COVID-19 pandemic is built upon data concerning confirmed cases and deaths. This data, however, can only be meaningfully interpreted alongside an accurate understanding of the extent of virus testing in different countries. This new database brings together official data on the extent of PCR testing over time for 94 countries. We provide a time series for the daily number of tests performed, or people tested, together with metadata describing data quality and comparability issues needed for the interpretation of the time series. The database is updated regularly through a combination of automated scraping and manual collection and verification, and is entirely replicable, with sources provided for each observation. In providing accessible cross-country data on testing output, it aims to facilitate the incorporation of this crucial information into epidemiological studies, as well as track a key component of countries' responses to COVID-19.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.