False Coronavirus Disease 2019 Cases due to Contamination by Inactivated Virus Vaccine.

To, Kelvin Kai-Wang; Li, Xin; Lung, David Christopher; Ip, Jonathan Daniel; Chan, Wan-Mui; Chu, Allen Wing-Ho; Yip, Cyril Chik-Yan; Chen, Jonathan H K et al. · Clin Infect Dis · 2022

case_report · Level V

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Abstract

A false-positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) reverse-transcription polymerase chain reaction result can lead to unnecessary public health measures. We report 2 individuals whose respiratory specimens were contaminated by an inactivated SARS-CoV-2 vaccine strain (CoronaVac), likely at vaccination premises. Incidentally, whole genome sequencing of CoronaVac showed adaptive deletions on the spike protein, which do not result in observable changes of antigenicity.

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