Key Points

In Week 46, the spread of SARS-CoV-2 accelerated sharply across the entire mainland, and the rise in new hospitalizations and admissions to intensive care units intensified.

• Mainland France:

  • Increase in incidence rates across all age groups and regions

  • Effective reproduction number rising sharply to 1.59

  • New hospitalizations and admissions to intensive care on the rise in most regions

• Overseas territories:

  • High and rising incidence rates in Martinique and Réunion

Variants

• Over 99% of cases identified as the Delta variant through sequencing during Flash surveys S43 (Oct. 25–29) and S44 (Nov. 1–5).

Contact tracing

• Significant increase in the number of cases and contacts

• Decrease in the proportion of new cases linked to a known transmission chain

Prevention

• Vaccination as of November 23, 2021 (Covid Vaccine data):

  • 77.1% of the total population had received at least one dose, and 75.5% were fully vaccinated

  • Among those aged 65 and older, 35.5% had received a booster dose; this rate rose to 73.3% among eligible individuals in this age group

• Wave 29 of the CoviPrev survey (October 28–November 5):

  • Slight decrease in anxiety (23%, -3 points) and sleep disturbances (66%, -4 points) since the previous wave (September 28 to October 5)

  • Upward trend in depressive symptoms since July (17%, +4 percentage points)

  • Importance of combined measures: vaccination, including booster shots for eligible individuals, participation in contact tracing, and adherence to preventive measures

Learn more

• See our report on the Covid-19 pandemic

• Visit our page on variants

• Visit our page on contact tracing

• Visit our page on the Flash survey

• Visit our page on the CoviPrev survey

• Visit our page on national surveillance of pediatric multisystem inflammatory syndrome (PIMS) cases

• See other national epidemiological updates