Bruno Kessler Foundation
On March 11, 2020, Italy imposed a national lockdown to curtail the spread of severe acute respiratory syndrome coronavirus 2. We estimate that, 14 days after lockdown, the net reproduction number had dropped below 1 and remained stable at »0.76 (95% CI 0.67-0.85) in all regions for >3 of the following weeks.
Guzzetta G, Riccardo F, Marziano V, Poletti P, Trentini F, Bella A, Andrianou X, Del Manso M, Fabiani M, Bellino S, Boros S, Urdiales AM, Vescio MF, Piccioli A, , Brusaferro S, Rezza G, Pezzotti P, Ajelli M, Merler S. (2020). Impact of a Nationwide Lockdown on SARS-CoV-2 Transmissibility, Italy. Emerging infectious diseases, 27(1)