COVID-19 outbreaks among crew members in non-cruise vessels anchoring in Salvador, Brazil, 2021. Mem Inst Oswaldo Cruz. 2022;117:e220114.

Author: Cardoso CW, Souza MMDS, Teles ACVDS, Argibay HD, Reis OBD, Pereira FM, et al.


The authors report eight SARS-CoV-2 occurrences in 2021 aboard various types of non-cruise vessels anchored in Salvador, Bahia, northeastern Brazil. Overall, the risk of SARS-CoV-2-infected crew members developing signs and symptoms associated with COVID-19 was significantly lower among those vaccinated than among those who were not [crude risk ratio (RR): 0.21; 95% confidence interval (CI): 0.06-0.75; age-adjusted RR: 0.19; CI: 0.06-0.65]; the effectiveness against symptomatic disease among those infected was 80.1% after adjusting for age. The majority of the crew in the outbreaks reported here were young males without a history of comorbidities; however, symptomatic infections were observed frequently and fatal cases occurred.
Another factor that must be considered during vessel epidemics is the length of time ships remain in port.

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