Face Masks Considerably Reduce COVID-19 Cases in Germany
Face masks became compulsory in all German federal states between 20 and 29 April 2020. Six regions made masks compulsory before the introduction at the federal level, between 6 and 25 April. This leads to a lag of 2 to 18 days between individual regions and the corresponding federal states.
The paper compares the Covid-19 development in various regions to their synthetic counterparts, constructed as a weighted average of control regions that are similar to the regions of interest. Structural dimensions taken into account include prior Covid-19 cases, the demographic structure and the local health care system.
The authors conclude that the daily growth rate of Covid-19 cases falls by around 40% due to mandatory mask-wearing.
Link to the paper here.
Posted by Maria Perrotta Berlin