Key Points

• Continuous circulation of SARS-CoV-2 between March 2020 and February 2023, causing epidemic waves of varying magnitude.

• A sharp increase in surveillance indicators in late 2021 linked to the emergence of the Omicron variant, followed by the circulation of sublineages of this variant with similar characteristics (high transmissibility, ability to evade immunity, but lower severity).

• Decrease in hospitalizations, critical care admissions, and deaths due to COVID-19 linked to vaccination and the lower virulence of the Omicron variant.

• Continued circulation of SARS-CoV-2 necessitates remaining vigilant and adapting preventive measures to the virus’s circulation.