Investigation of outbreak cases infected with the SARS-CoV-2 B.1.640 variant in a fully vaccinated elderly population, Normandy, France, November to December 2021

Brice Mastrovito (1) , Chloé Naimi (1) , Leslie Kouam (1) , Xavier Naudot (2) , Lucie Fournier (1) , Guillaume Spaccaferri (1) , Jean-Christophe Plantier (3, 4) , Anaïs Soares (2) , Fabienne de Oliveira (3, 4) , Marie Gueudin (3, 4) , Véronique Jacomo (2) , Céline Leroy (5) , Alice Moisan (3, 4) , Mélanie Martel (1)

1 Santé publique France - French National Public Health Agency [Saint-Maurice, France]
2 Eurofins Biomnis
3 DYNAMICURE - Dynamique Microbienne associée aux Infections Urinaires et Respiratoires
4 Laboratoire de virologie [Rouen]
5 ARS Normandie - Agence Régionale de Santé de Normandie [Caen]

Three confirmed infections with the SARS-CoV-2 B.1.640 variant under monitoring were reported in Normandy, north-western France in late November 2021. Investigations led to the identification of two events linked to the same cluster. A total of 75 confirmed and probable B.1.640 cases were reported. All had completed the primary vaccination series. Sixty-two cases were older than 65 years. Fifty-six cases had symptoms and four were hospitalised. This investigation provides preliminary results concerning a variant with limited information currently available.

Domains: Life Sciences [q-bio]; Microbiology and Parasitology; Virology; Life Sciences [q-bio]; Microbiology and Parasitology; Protistology; Life Sciences [q-bio]; Microbiology and Parasitology; Mycology; Life Sciences [q-bio]; Microbiology and Parasitology; Bacteriology

Brice Mastrovito, Chloé Naimi, Leslie Kouam, Xavier Naudot, Lucie Fournier, et al.. Investigation of outbreak cases infected with the SARS-CoV-2 B.1.640 variant in a fully vaccinated elderly population, Normandy, France, November to December 2021. Eurosurveillance, 2022, 27 (6), ⟨10.2807/1560-7917.ES.2022.27.6.2200078⟩. ⟨hal-03706394⟩