 We find a striking relationship between the negative variation of mobility flows and the net reproduction number , in all Italian regions, between March 11th and March 18th, when the country entered the lockdown.
<clarity>  We find a striking relationship between the negative variation of mobility flows and the net reproduction number , in all Italian regions, between March 11th and March 18th, when the country entered the lockdown.
 We find a striking relationship between the decrease in mobility flows and the net reproduction number , in all Italian regions, between March 11th and March 18th, when the country entered the lockdown.