In May 2020, 4.5% of the population of metropolitan France had developed antibodies against SARS-CoV-2

Warszawski J, Bajos N, Meyer L, de Lamballerie X, Seng R, Beaumont A, Slama R, Hisbergues M, Rahib D, Lydie N, Legendre B, Barlet M, Rey S, Raynaud P, Leduc A, Costemalle V, Beck F, Legleye S, Castell L, Givord P, Favre-Martinoz C, Paliod N, Sihol J, Sillard P. In May 2020, 4.5% of the population of metropolitan France had developed antibodies against SARS-CoV-2. Études et Résultats. 2020; (1167): 1-6.