Virologic and Immunologic Characterization of Coronavirus Disease 2019 Recrudescence After Nirmatrelvir/Ritonavir Treatment.

Carlin, Aaron F; Clark, Alex E; Chaillon, Antoine; Garretson, Aaron F; Bray, William; Porrachia, Magali; Santos, AsherLev T; Rana, Tariq M et al. · Clin Infect Dis · 2023

case_report · Level V

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Abstract

We isolated a severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) BA.2 variant from a person with coronavirus disease 2019 recrudescence after nirmatrelvir/ritonavir treatment. Antiviral sensitivity and neutralizing antibody testing were performed with both parental SARS-CoV-2 and multiple variants of concern. We found that neither nirmatrelvir resistance nor absence of neutralizing immunity was a likely cause of the recrudescence.

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