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Covid-19 reinfection: How common is it?

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Most tests for the new strain of coronavirus involve taking a swab sample for analysis
Most tests for the new strain of coronavirus involve taking a swab sample for analysis
Paul Biris

Scientists continue to learn about the evolution of SARS-CoV-2, the virus that causes Covid-19 disease, as it unfolds. The World Health Organization (WHO) indicates that there are some reports of individuals who have been reinfected with Covid-19, the first case being reported in August 2020.

These reports raise critical questions about the strength and durability of the immune response to primary infection, which are key questions in predicting the course of the Covid-19 pandemic, authors of a recently published paper in the Journal of Clinical Microbiology note.

The five researchers reviewed 16 cases that have been published to date or are available in preprint servers (not yet peer-reviewed). Based on their analysis, they reveal certain knowns and unknowns about Covid reinfection.

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