Key Points

In Week 01 in Île-de-France, virological and hospital indicators continued to rise sharply, indicating very intense circulation of the SARS-CoV-2 virus in Île-de-France.

• The crude incidence rate continued to rise sharply: it stands at 4,044 cases per 100,000 inhabitants, the highest value recorded in the region since the start of the epidemic.

• The positivity rate climbed to 22.6%, exceeding the value recorded at the peak of the second wave.

• The testing rate reached its highest level since the start of the epidemic at 17,890 per 100,000 inhabitants.

• The Omicron variant (21K, B.1.1.529), which has been the dominant strain in Île-de-France since Week 51, continued to spread rapidly in the region; however, the Delta variant remained present.

• SI-VIC data again showed an increase in new hospitalizations, new ICU admissions, and new deaths reported in hospitals.

• Vaccination coverage with at least one dose was 74.5%, 73.3% for the full course, and 40.9% for the booster dose.

Given the high and rapidly rising viral circulation, vaccinating all eligible individuals remains essential and must be combined with strict adherence to other preventive measures.