Before revision:  The basic reproductive factor was R0 =3.4 +/-0.1 \pm0 before the lockdown and 0.65 +/-0.04 \pm0 (90\% c.l.) during it, both with small regional variations.
After revision:  The basic reproductive factor , averaged over France, was R_0 =3.4 +/-0.1 \pm0 before the lockdown and 0.65 +/-0.04 \pm0 (90\% c.l.) during it, both with small regional variations.