What is the molecular evolution of SARS-CoV-2 viruses circulating in the region? Results of Flash Survey #16

Key Points

Consolidated results of Flash Survey #16 (July 20, 2021)

4,811 samples from 17 regions/territories in mainland France and overseas territories (23.2% of the 20,707 positive cases reported today).

The following variants of concern were detected among the samples:

  • In mainland France:

    • 95.8% of 21A variants (Delta, B.1.617.2, first identified in India)

    • 3.3% of 20I variants (Alpha, V1, B.1.1.7, first identified in the United Kingdom)

    • 0.2% of 20J variants (Gamma, V3, P.1, first identified in Brazil)

    • 0.2% of 20H variants (Beta, V2, B.1.351, first identified in South Africa)

    • 0.3% of 20I/484K variants (B.1.1.7 + E484K, first identified in the United Kingdom)

  • Overseas territories:

    • In Guadeloupe: 26.7% Alpha variants and 73.3% Delta variants

    • In Martinique: 80.4% Alpha variants and 19.6% Delta variants

    • In French Guiana: sample sizes too small to produce interpretable results; however, Gamma and Delta variants have been detected

    • In Réunion: 60.0% Beta variants, 36.5% Delta variants, and 3.5% Alpha variants

    • In Mayotte: no samples included

Flash Surveys#

Learn more about the Flash surveys# and view all results from the various survey waves

In relation to

Our latest news

news

2026 “Sexual Behavior” Survey (ERAS) for men who have sex with men

news

Hervé Maisonneuve has been appointed scientific integrity officer for a...

Visuel illustratif

news

Public Health France 2026 Barometer: Launch of the Survey