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Meta-analysis of diagnostic performance of serological tests for SARS-CoV-2 antibodies up to 25 April 2020 and public health implications.

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TLDR
The diagnostic accuracy of SARS-CoV-2 serological tests was reviewed and it was concluded that these tests should be used for prevalence surveys only in hard-hit areas and not in populations with low levels of seroconverted individuals.
Abstract
We reviewed the diagnostic accuracy of SARS-CoV-2 serological tests. Random-effects models yielded a summary sensitivity of 82% for IgM, and 85% for IgG and total antibodies. For specificity, the pooled estimate were 98% for IgM and 99% for IgG and total antibodies. In populations with ≤ 5% of seroconverted individuals, unless the assays have perfect (i.e. 100%) specificity, the positive predictive value would be ≤ 88%. Serological tests should be used for prevalence surveys only in hard-hit areas.

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Journal ArticleDOI

Considerations for diagnostic COVID-19 tests.

TL;DR: The crucial role of diagnostic tests during the first global wave of coronavirus disease 2019 (COVID-19) and the technical and implementation problems encountered during the early phase of the pandemic are explored and future directions for the progressive and better use of diagnostics during a possible resurgence of CO VID-19 in future global waves or regional outbreaks are defined.
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SARS-CoV-2 seroprevalence worldwide: a systematic review and meta-analysis.

TL;DR: A meta-analysis to estimate the global and regional SARS-CoV-2 seroprevalence rates in humans, and to assess whether serop revalence associates with geographical, climatic and socio-demographic factors, suggested an association with income, human development and climate change.
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Tools and Techniques for Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2)/COVID-19 Detection.

TL;DR: A review of the technologies used to detect SARS-CoV-2 in clinical laboratories as well as advances made for molecular, antigen-based, and immunological point-of-care testing, including recent developments in sensor and biosensor devices is presented in this paper.
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Undiagnosed SARS-CoV-2 seropositivity during the first 6 months of the COVID-19 pandemic in the United States.

TL;DR: In this paper, the authors analyzed seropositivity in 9089 adults in the United States who had not been diagnosed previously with COVID-19 and found that there were 4.8 undiagnosed SARS-CoV-2 infections for every diagnosed case of COVID19, and an estimated 16.8 million infections were undistributed by mid-July 2020 in the USA.
References
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Journal ArticleDOI

Antibody Responses to SARS-CoV-2 in Patients With Novel Coronavirus Disease 2019.

TL;DR: The findings provide strong empirical support for the routine application of serological testing in the diagnosis and management of COVID-19 patients and offer vital clinical information during the course of SARS-CoV-2 infection.
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The diagnostic odds ratio: a single indicator of test performance

TL;DR: The diagnostic odds ratio is closely linked to existing indicators, it facilitates formal meta-analysis of studies on diagnostic test performance, and it is derived from logistic models, which allow for the inclusion of additional variables to correct for heterogeneity.
Journal ArticleDOI

Evaluation of Nucleocapsid and Spike Protein-Based Enzyme-Linked Immunosorbent Assays for Detecting Antibodies against SARS-CoV-2.

TL;DR: ELISA has a high sensitivity, especially for the detection of serum samples from patients after 10 d.p.o., so it could be an important supplementary method for COVID-19 diagnosis.
Journal ArticleDOI

Covid-19: identifying and isolating asymptomatic people helped eliminate virus in Italian village.

Michael Day
- 23 Mar 2020 - 
TL;DR: How blanket testing in a completely isolated village of roughly 3000 people in northern Italy saw the number of people with covid-19 symptoms fall by over 90% within 10 days is reported.
Journal ArticleDOI

Serology characteristics of SARS-CoV-2 infection after exposure and post-symptom onset.

TL;DR: Serology testing provides an important complement to RNA testing in the later stages of illness for pathogenic-specific diagnosis and helpful information to evaluate the adapted immunity status of patients.
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