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. 2022 Aug;27(34):2100953.
doi: 10.2807/1560-7917.ES.2022.27.34.2100953.

Epidemiological profile of COVID-19 in the French overseas department Mayotte, 2020 to 2021

Marion Subiros  1   2 , Charlotte Robert De Latour  1 , Fanny Parenton  1   2 , Ibtissame Soulaimana  1 , Youssouf Hassani  1 , Renaud Blondé  2 , François Pousset  2 , Yvonnick Boué  2 , Camille Estagnasie  2 , Gonzague Martin-Lecamp  2 , Abdoulahy Diallo  2 , Lucas Balloy  2 , Mohamadou Niang  2 , Christophe Caralp  2 , Aurélie Cann  2 , Abdourahim Chamouine  2 , Alice Miquel  2 , Geneviève Dennetière  3 , Julie Durand  3 , Maxime Jean  3 , Sophie Olivier  2 , Louis Collet  2 , Nicole Tayeb  2 , Patrice Combe  2
Affiliations

Epidemiological profile of COVID-19 in the French overseas department Mayotte, 2020 to 2021

Marion Subiros et al. Euro Surveill. 2022 Aug.

Abstract

BackgroundDuring the COVID-19 pandemic, national and local measures were implemented on the island of Mayotte, a French overseas department in the Indian Ocean with critical socioeconomic and health indicators.AimWe aimed to describe the COVID-19 outbreak in Mayotte from March 2020 to March 2021, with two waves from 9 March to 31 December 2020 and from 1 January to 14 March 2021, linked to Beta (20H/501Y.V2) variant.MethodsTo understand and assess the dynamic and the severity of the COVID-19 outbreak in Mayotte, surveillance and investigation/contact tracing systems were set up including virological, epidemiological, hospitalisation and mortality indicators.ResultsIn total, 18,131 cases were laboratory confirmed, with PCR or RAT. During the first wave, incidence rate (IR) peaked in week 19 2020 (133/100,000). New hospitalisations peaked in week 20 (54 patients, including seven to ICU). Testing rate increased tenfold during the second wave. Between mid-December 2020 and mid-January 2021, IR doubled (851/100,000 in week 5 2021) and positivity rate tripled (28% in week 6 2021). SARS-CoV-2 Beta variant (Pangolin B.1.351) was detected in more than 80% of positive samples. Hospital admissions peaked in week 6 2021 with 225 patients, including 30 to ICU.ConclusionThis massive second wave could be linked to the high transmissibility of the Beta variant. The increase in the number of cases has naturally led to a higher number of severe cases and an overburdening of the hospital. This study shows the value of a real-time epidemiological surveillance for better understanding crisis situations.

Keywords: Beta variant; COVID-19; Mayotte; SARS-CoV-2; epidemiology; multi-systemic inflammatory syndromes; severity; surveillance.

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Conflict of interest statement

Conflict of interest: None declared.

Figures

Figure 1
Figure 1
Epidemic curve of confirmed COVID-19 cases by sampling date, timeline of public health measures and significant local events, Mayotte, week 11 2020–week 10 2021 (n = 18,131)
Figure 2
Figure 2
COVID-19 incidence and testing rate (per 100,000 inhabitants), SARS-CoV-2 positivity rate, Mayotte, week 11 2020–week 10 2021
Figure 3
Figure 3
Distribution of general population, COVID-19 confirmed cases and SARS-CoV-2 testing rate (per 100,000 inhabitants), by wave and age group, Mayotte, week 11 2020–week 10 2021
Figure 4
Figure 4
Weekly evolution of total COVID-19 cases and new COVID-19 cases hospitalised at Mayotte Hospital Centre, week 11 2020–week 10 2021 (n = 1,524)
See this image and copyright information in PMC

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