The differential impact of physical distancing strategies on social contacts relevant for the spread of SARS-CoV-2: Evidence from a cross-national online survey, March – April 2020

Data on social contact numbers in the early phase of the COVID-19 pandemic (March-April 2020) in 7 European countries and the US.

关于COVID-19大流行初期（2020年3月至4月）7个欧洲国家及美国的社交接触人数数据。