Table. Regional and national epidemiological data of SARS-CoV-2 variant B.1.351 clusters, France, December 2020–January 2021 (n = 36 cases).
| Ile-de-France | Pays de la Loire | Occitanie | Centre-Val de Loire a | Total (national level) | |
|---|---|---|---|---|---|
| Number of Mozambique returnees | 1 | 2 | 2 | 0 | 5 |
| Known earliest Ct value | 20 | 19; 15 | Not available | Not applicable | Not applicable |
| Households with contacts | 6 | 4 | 3 | 1a | 14 |
| Identified contacts | 13 | 18 | 6 | 6 | 43 |
| Tested contacts | 13 | 18 | 6 | 4 | 41 |
| Confirmed cases among contacts | 8 | 10 | 0 | 0 | 18 |
| Probable cases among contacts | 3 | 3 | 3 | 4 | 13 |
| Undetermined result among contacts | 1 | 0 | 0 | 0 | 1 |
| Negative result among contacts | 1 | 5 | 3 | 0 | 9 |
| Overall attack rateb among tested contacts | 11/13 | 13/18 | 3/6 | 4/4 | 31/41 |
| Secondary attack rateb among tested contacts | 7/8 | 7/11 | 2/3 | 4/4a | 20/26 |
| Tertiary attack rateb among tested contacts | 4/5 | 6/7 | 1/3a | 0/0 | 11/15 |
| Symptomatic cases among positiveb contacts | 3/11 | 6/13 | 1/3 | 3/4 | 13/31 |
| Symptomatic cases admitted to hospital | 0/3 | 1/6 | 0/1 | 0/3 | 1/13 |
| Hospitalised cases admitted to intensive care | 0/0 | 0/1 | 0/0 | 0/0 | 0/1 |
| Linked positive tests around the contacts | 0/303 | 0/345 | 0/2 | 0/0 | 0/650 |
SARS-CoV-2: severe acute respiratory syndrome coronavirus 2.
a Part of the Ile-de-France cluster.
b Confirmed and probable cases.