Related Experiment Video
Updated: Nov 9, 2025
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Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
Published on: November 10, 2023
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COVID-19 reinfections.
Summary
SARS-CoV-2 reinfections are occurring, with 28 symptomatic cases identified in the Czech Republic. These COVID-19 reinfections, though rare, highlight the possibility of subsequent infections in recovered patients.
Area of Science:
- Virology
- Epidemiology
- Infectious Diseases
Background:
- Reports of SARS-CoV-2 reinfections are increasing globally.
- Understanding the frequency and characteristics of reinfection is crucial for public health strategies.
- Previous infection with SARS-CoV-2 does not guarantee complete immunity.
Purpose of the Study:
- To investigate and report cases of symptomatic SARS-CoV-2 reinfections.
- To determine the incidence of reinfection in a defined population.
- To describe the clinical features and intervals between infections.
Main Methods:
- Retrospective analysis of confirmed COVID-19 cases in the Czech Republic.
- Identification of patients with two distinct symptomatic episodes of SARS-CoV-2 infection.
- RT-PCR testing during both symptomatic episodes.
Main Results:
- 28 cases of symptomatic SARS-CoV-2 reinfection were identified between March and November 2020.
- The median interval between the first and second symptomatic episodes was 201.5 days.
- Symptomatic reinfections occurred in approximately 0.2% of at-risk patients, with most cases exhibiting mild symptoms.
Conclusions:
- COVID-19 reinfections are possible and can occur after a significant interval post-initial infection.
- The study suggests that symptomatic reinfections may be underdiagnosed.
- Reinfections are not exceptional and warrant continued surveillance and research.
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