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COVID-19: Black Swan or clumsy use?
Marcello Fiorini1, Antonio LA Gioia2
1Laboratory Medicine, Diagnostics Department, Health Local Unit North-West Tuscany, Pontedera Hospital, Pisa, Italy.
Journal of Preventive Medicine and Hygiene
|July 29, 2021
Summary
The COVID-19 pandemic
Area of Science:
- Epidemiology
- Clinical Diagnostics
- Public Health Policy
Background:
- The COVID-19 pandemic was widely labeled a "Black Swan" event.
- However, the handling of the epidemic, particularly in Italy, warrants scrutiny.
- A flawed diagnostic protocol created uncertainty for healthcare personnel.
Purpose of the Study:
- To evaluate the analytical performance of serological tests for COVID-19.
- To assess the impact of diagnostic test limitations on public health decisions.
- To determine the appropriate use of laboratory diagnostics in pandemic management.
Main Methods:
- Analysis of a two-step diagnostic protocol involving IgM/IgG anti-COVID and RT-PCR tests.
- Evaluation of analytical test specifications under varying prevalence conditions.
- Quantification of diagnostic uncertainties stemming from test limitations.
Main Results:
- The implemented diagnostic protocol introduced significant uncertainty.
- Analytical limitations of serological tests were identified.
- The protocol's effectiveness was compromised by test inaccuracies.
Conclusions:
- Laboratory diagnostics are valuable for epidemiological surveillance.
- Current serological tests are unsuitable for issuing "healthy passes" or individual health status.
- Rethinking pandemic response strategies is crucial, focusing on reliable diagnostics.
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