A COVID-19 superspreading event involving two variants during sociotherapy activities in a French mental health centre.

ABSTRACT:

Background/purpose

Investigation of a COVID-19 super-spreading event involving both beta and delta variants of SARS-CoV-2, following a choir in a mental health centre.

Methods

An epidemiological and biological (RT-PCR, mutations screening and sequencing) investigation was carried out to identify the chains of transmission. A morbidity and mortality review was performed using ALARM root causes analysis to understand how this superspreading event could have taken place.

Results

On May 25 and 26, 2021, all 13 choir participants were screened. Of these, eight were positive. None of them was vaccinated. Biological results suggested seven cases of delta variants (three confirmed by sequencing) and one case of beta variant. The screening of 141 contact individuals identified

SUBMITTER: Ferriot C 

PROVIDER: S-EPMC9113770 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature